subject stringclasses 4 values | question stringlengths 0 1.78k | answer int8 0 4 | choices listlengths 3 5 | image imagewidth (px) 91 915 | hint stringclasses 1 value | task stringclasses 1 value | grade stringclasses 1 value | topic stringclasses 1 value | category stringclasses 1 value | skill stringclasses 1 value | lecture stringclasses 1 value | solution stringclasses 1 value |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Physics |
A current-carrying wire and coordinate system is shown above. Initially, the wire carries a current I toward the top of the page. The amount of current is steadily decreased until it is 0 A, then steadily increased until it reaches a value of I in the downward direction. This change in current takes time t. The magnetic field versus time at the observation point P from t = 0 until t is graphed. Which statement is true concerning the graph if +z is above the horizontal axis and -z is below the horizontal axis?
| 1 | [
"The graph has a constant slope.",
"The graph is piecewise linear with a negative slope for the first half and a positive slope for the second half.",
"The graph is piecewise linear with a positive slope for the first half and a negative slope for the second half.",
"The graph is a curve showing an inverse relationship."
] | |||||||||
Physics | Radiothorium-228 decays into Radon-220 through two alpha decays, as shown below.Radiothorium-228 decays into Radon-220 through two alpha decays, as shown below.
Radiothorium-228 decays into Radon-220 through two alpha decays, as shown below.Which equation correctly describes the energy released during this process?
| 3 | [
"(mTh - mRn)c2",
"(mTh + 2mHe - mRn)c2",
"(mTh - 2mHe - mRn)c2",
"(mRn + 2mHe - mTh)c2"
] | |||||||||
Physics |
The wave function of a quantum object vs. position is graphed above. Which of the following correctly ranks the probabilities of observing the particle at the listed positions?
| 1 | [
"P(x = 0.5 m) > P(x = 2.25 m) > P(x = 1.75 m)",
"P(x = 0.5 m) > P(x = 1.75 m) > P(x = 1.25 m)",
"P(x = 3.0 m) > P(x = 1.75 m) > P(x = 2.0 m)",
"P(x = 3.5 m) > P(x = 3.0 m) > P(x = 1.75 m)"
] | |||||||||
Physics |
An experiment is conducted to determine the power output from a circuit as various voltages are supplied to the circuit. The circuit is set up so that it draws a constant current. What is the value of the current in the circuit that produced the graph above?
| 1 | [
"0.00 A",
"0.25 A",
"1.0 A",
"6.0 A"
] | |||||||||
Physics |
A positive charge of 2Q and a negative charge of 4Q are arranged at positions as shown above. What is the correct ranking of the electric potential at points along the x-axis?
| 2 | [
"V(x = 4 m) = V(x = 2 m) > V(x = 1 m)",
"V(x = 4 m) > V(x = 1 m) > V(x = 2 m)",
"V(x = 1 m) > V(x = 2 m) > V(x = 4 m)",
"V(x = 4 m) > V(x = 2 m) > V(x = 1 m)"
] | |||||||||
Physics |
An insulating rod separates two conducting spheres as shown above. Point A is midway between the spheres. Point B lies on the axis of the rod. Which of the following arrangements of charges would result in a net torque on the rod?
| 1 | [
"Charge both spheres negatively and place a positive charge at point A.",
"Charge one sphere negatively and the other positively and place a positive charge at point A.",
"Charge both spheres negatively and place a positive charge at point B.",
"Charge one sphere negatively and the other positively and place a positive charge at point B."
] | |||||||||
Physics |
The tube shown above carries water. At some point, the tube splits, as shown above. Three points within the tube are labeled A, B, and C. The greatest diameter is at A and the smallest diameter is at B. How do the pressures in the pipes compare at the three points?
| 3 | [
"PA > PC > PB",
"PA = PB = PC",
"PB = PC > PA",
"PB > PC > PA"
] | |||||||||
Physics |
A ray of light enters the pair of tanks as shown above. The light rays in the water and glass tank are shown at the left, with the light exiting the pair of tanks at a point Y. The light ray in the air tank is identical to the ray in the water tank, entering at the same height and same angle. Both sets of tanks use the same glass. How will the ray exiting the second glass tank compare to height Y?
| 1 | [
"The ray will not exit the second tank due to total internal reflection.",
"The exiting ray will be closer to the top of the tank than Y.",
"The exiting ray will be at the same height as Y.",
"The exiting ray will be farther from the top of the tank than Y."
] | |||||||||
Physics |
Three neutral conducting spheres sit on insulating bases. The spheres are separated by a very large distance. The sphere in the center is given a positive charge. The spheres are brought close together, as shown above, but not allowed to come into contact with one another. Which is the correct description of the net charge on each sphere?
| 2 | [
"All three spheres are positively charged.",
"The center sphere is positively charged and the two outer spheres are negatively charged.",
"The center sphere is positively charged and the other two are neutral.",
"All three spheres are neutral."
] | |||||||||
Physics |
The instrument in an aircraft to measure airspeed is known as the pitot tube, shown in the figure above. The opening facing the incoming air (with the small aperture) is the part meant to capture the air at rest. The opening perpendicular to the flow of air (with the large aperture) is meant to capture air at speed. If h = 1 m and the fluid within the manometer is water, what is the airspeed? Take the density of air to be Ïair = 1.2 kg/m3.
| 3 | [
"27 m/s",
"68 m/s",
"95 m/s",
"128 m/s"
] | |||||||||
Physics |
A beam of light goes from water to air. Depending on the actual angle that the light strikes the surface, which of the following rays are possible outcomes?
| 3 | [
"A only",
"B only",
"A or D",
"C or D"
] | |||||||||
Physics |
A tube with two T branches that has an open end is inserted in a liquid. However, the section of the tube above part B is hidden from view. The hidden section may be wider or narrower. Air is blown through the tube and the water levels rise as shown. You can conclude which of the following?
| 1 | [
"The picture as drawn is impossible-A and B must be at equal heights.",
"The tube is narrower and the air speed is greater above section B.",
"The tube is narrower and the air speed is less above section B.",
"The tube is wider and the air speed is greater above section B."
] | |||||||||
Physics |
In the figure above, a ray of light hits an object and travels parallel to the principal axis as shown by the dotted line. Which line shows the correct continuation of the ray after it hits the concave lens?
| 0 | [
"a",
"b",
"c",
"d"
] | |||||||||
Physics |
A machine shoots a proton, a neutron, or an electron into a magnetic field at various locations. The paths of two particles are shown above. Assume they are far enough apart so that they do not intersect and the magnetic field is going out of the page, as shown. What can you say about the paths that represent each particle?
| 0 | [
"a is the proton and b is the electron.",
"b is the proton and a is the electron.",
"Either may be a neutron.",
"You cannot make any conclusions without knowing the velocities."
] | |||||||||
Physics |
Which statement correctly characterizes the work done by the gas during the ABCDA cycle shown in the above P-V diagram?
| 2 | [
"There is no work done by the gas because the system both starts and concludes in state A.",
"There is no work done because the work done during the transition from AâB cancels out the work done in transition from CâD.",
"The work done by the gas is positive because the work done during the transition from AâB is greater than the work done in transition from CâD.",
"The work done by the gas is positive because the work done during the transition from BâC is greater than the work done in transition from DâA."
] | |||||||||
Physics |
A neutral conducting sphere is hung from a thin insulating string. A positively charged object is brought to point P. The two objects are not allowed to touch. What is true about the string when the positively charged object is present at point P?
| 2 | [
"The tension is the same as before the object was present at point P.",
"The tension is greater than when the object was not at point P, and the string stretches to the left of its original orientation.",
"The tension is greater than when the object was not at point P, and the string stretches to the right of its original orientation.",
"The tension is less than when the object was not at point P, and the string stretches to the left of its original orientation."
] | |||||||||
Physics |
Points P and Q lie between the plates of a fully charged parallel plate capacitor as shown above. The lower plate is negatively charged and the upper plate is positively charged. How do the magnitudes of the electric fields at points P and Q compare?
| 1 | [
"The field is 0 N/C at both points.",
"The field is the same at both points, but not 0 N/C.",
"EP > EQ",
"EQ > EP"
] | |||||||||
Physics |
A pipe with a diameter of D splits into two smaller, identical pipes with diameter d. If the speed of the water in the small pipes is v, what is the speed of the water in the large pipe?
| 3 | [
"dv/D",
"2dv/D",
"d2v/D2",
"2d2v/D2"
] | |||||||||
Physics | What's the missing particle in the following nuclear reaction?What's the missing particle in the following nuclear reaction?
| 1 | [
"Proton",
"Neutron",
"Electron",
"Positron"
] | |||||||||
Physics | A partial energy-level diagram for an atom is shown below. What photon energies could this atom emit if it begins in the n = 3 state?A partial energy-level diagram for an atom is shown below. What photon energies could this atom emit if it begins in the n = 3 state?
A partial energy-level diagram for an atom is shown below. What photon energies could this atom emit if it begins in the n = 3 state?
| 3 | [
"5 eV only",
"3 eV or 7 eV only",
"2 eV, 3 eV, or 7 eV",
"3 eV, 4 eV, or 7 eV"
] | |||||||||
Physics |
The above picture shows a converging mirror and an object, as well as the image, which is formed from standard ray tracing. After the image is formed, an opaque block, also shown in the picture, is inserted to block the top half of the mirror. What changes, if any, will be observed in the image?
| 0 | [
"The image will remain complete but will be diminished in brightness.",
"Part of the image will be absent, but the rest will be as bright was it was before the insertion of the block.",
"Part of the image will be absent and the part which remains will be diminished in brightness.",
"No change will be observed."
] | |||||||||
Physics |
The above picture shows a converging mirror and an object, as well as the image, which is formed from standard ray tracing. Also shown, a dotted vertical line indicates the image place for this configuration. Also shown in a ray that travels from the top of the image to the point P on the curved mirror. The point P lies above the line which is parallel to the optic axis from the tip of the image. Where will the reflected ray from point P intersect the image plane?
| 2 | [
"On the optic axis",
"Below the optic axis but above the tip of the image",
"At the tip of the image",
"Farther from the optic axis than the tip of the image"
] | |||||||||
Physics | A beam of light in air is incident upon the smooth surface of a piece of flint glass, as shown:A beam of light in air is incident upon the smooth surface of a piece of flint glass, as shown:
A beam of light in air is incident upon the smooth surface of a piece of flint glass, as shown:As the incident angle is increased toward θ = 90°, what observation is made of the refracted ray? All angle references are relative to the surface as shown for both rays.
| 1 | [
"The refracted ray angle increases as the incident angle increases, but the value of the refracted angle is always smaller than the incident angle.",
"The refracted ray angle increases as the incident angle increases, but the value of the refracted angle is always larger than the incident angle.",
"The refracted ray angle increases as the incident angle increases until at some angle total internal reflection begins to occur.",
"The refracted ray angle decreases as the incident angle increases, but the value of the refracted angle is always smaller than the incident angle."
] | |||||||||
Physics | As shown in the figures below, a bar magnet is moved as a constant speed through a loop of wire. Figure A shows the bar magnet when it is as a position below the loop of wire and figure B shows the loop of wire after it has passed completely through the loop.As shown in the figures below, a bar magnet is moved as a constant speed through a loop of wire. Figure A shows the bar magnet when it is as a position below the loop of wire and figure B shows the loop of wire after it has passed completely through the loop.
As shown in the figures below, a bar magnet is moved as a constant speed through a loop of wire. Figure A shows the bar magnet when it is as a position below the loop of wire and figure B shows the loop of wire after it has passed completely through the loop.Which of the following best describes the direction or directions of the current induced in the loop when the loop is looked at from above? Note that when looking at the loop from above, the bar magnet will be moving toward the viewer.
| 2 | [
"Always clockwise",
"Always counterclockwise",
"First clockwise, then counterclockwise",
"First counterclockwise, then clockwise"
] | |||||||||
Physics | A conducting rod of length 0.2 m and resistance 10 ohms between its endpoints slides without friction along a U-shaped conductor in a uniform magnetic field B of magnitude 0.5 T perpendicular to the plane of the conductor, as shown in the diagram below.A conducting rod of length 0.2 m and resistance 10 ohms between its endpoints slides without friction along a U-shaped conductor in a uniform magnetic field B of magnitude 0.5 T perpendicular to the plane of the conductor, as shown in the diagram below.
A conducting rod of length 0.2 m and resistance 10 ohms between its endpoints slides without friction along a U-shaped conductor in a uniform magnetic field B of magnitude 0.5 T perpendicular to the plane of the conductor, as shown in the diagram below.If the rod is moving with velocity v = 3 m/s to the left, what is the magnitude and direction of the current induced in the rod?
A conducting rod of length 0.2 m and resistance 10 ohms between its endpoints slides without friction along a U-shaped conductor in a uniform magnetic field B of magnitude 0.5 T perpendicular to the plane of the conductor, as shown in the diagram below.Current Direction
| 0 | [
"0.03 A down",
"0.03 A up",
"0.3 A down",
"0.3 A up"
] | |||||||||
Physics | What is the direction of force acting on the current-carrying wire as shown below?What is the direction of force acting on the current-carrying wire as shown below?
| 2 | [
"To the bottom of the page",
"Into the page",
"Out of the page",
"To the right of the page"
] | |||||||||
Physics | Here is a section of a wire with a current moving to the right. Where is the magnetic field strongest and pointing INTO the page?Here is a section of a wire with a current moving to the right. Where is the magnetic field strongest and pointing INTO the page?
| 2 | [
"A",
"B",
"C",
"D"
] | |||||||||
Physics | In the figure below, what is the magnetic field at the Point P, which is midway between the two wires?In the figure below, what is the magnetic field at the Point P, which is midway between the two wires?
| 3 | [
"2μ0I/(Ïd), into the plane of the page",
"μ0I/(2Ïd), out of the plane of the page",
"μ0I/(2Ïd), into the plane of the page",
"Zero"
] | |||||||||
Physics | In the figure below, what must be the direction of the particle's velocity, v?In the figure below, what must be the direction of the particle's velocity, v?
| 2 | [
"Downward, in the plane of the page",
"Upward, in the plane of the page",
"Out of the plane of the page",
"Into the plane of the page"
] | |||||||||
Physics | A particle of charge -q moves to the left at speed v through a uniform magnetic field B which points into the second quadrant, as shown below.A particle of charge -q moves to the left at speed v through a uniform magnetic field B which points into the second quadrant, as shown below.
A particle of charge -q moves to the left at speed v through a uniform magnetic field B which points into the second quadrant, as shown below.A second experiment is performed which results in the same magnitude and same direction of the magnetic force on the particle. Which of the following could NOT be the conditions for the new experiment?
| 1 | [
"B is unchanged, but q is now positive and v is directed to the right.",
"The charge is still negative, but v and B are rotated 90° into the plane of the paper so that v is directed along the -z-axis.",
"The charge is still negative, but v and B are rotated 90° counterclockwise so that v is directed along the -y-axis.",
"V is unchanged, but q is now positive and B is rotated 180° to point into the fourth quadrant."
] | |||||||||
Physics |
If each of the capacitors in the array shown above is C, what is the capacitance of the entire combination?
| 3 | [
"C/2",
"2C/3",
"5C/6",
"2C"
] | |||||||||
Physics |
What is the voltage drop across the 12 Ω resistor in the portion of the circuit shown above?
| 1 | [
"24 V",
"36 V",
"48 V",
"72 V"
] | |||||||||
Physics |
Three identical light bulbs are connected to a source of emf, as shown in the diagram above. What will happen if the middle bulb burns out?
| 2 | [
"The light intensity of the other two bulbs will decrease (but they won't go out).",
"The light intensity of the other two bulbs will increase.",
"The light intensity of the other two bulbs will remain the same.",
"More current will be drawn from the source of emf."
] | |||||||||
Physics |
The circuit shown above has a constant voltage between points a and b. The voltage has been flowing for a long time. What is the resistance of the circuit?
| 2 | [
"0.47 Ω",
"1.5 Ω",
"2.1 Ω",
"10 Ω"
] | |||||||||
Physics | A charge Q creates an electric field through which a second charge q moves, as shown below. q is initially at point B and is moved to point | 1 | [
"The potential from Q at position A is VA = 100 V and at B is VB = 200 V. The charge on q is negative. What is the sign of Q and the sign of the work done by the electric field of Q as q is moved from B to A?A charge Q creates an electric field through which a second charge q moves, as shown below. q is initially at point B and is moved to point A. The potential from Q at position A is VA = 100 V and at B is VB = 200 V. The charge on q is negative. What is the sign of Q and the sign of the work done by the electric field of Q as q is moved from B to A?",
"Q is positive and the work done by the electric field is positive.",
"Q is positive and the work done by the electric field is negative.",
"Q is negative and the work done by the electric field is positive.",
"Q is negative and the work done by the electric field is negative."
] | |||||||||
Physics |
Which points in this uniform electric field (between the plates of the capacitor) shown above lie on the same equipotential?
| 1 | [
"1 and 3 only",
"2 and 4 only",
"None lie on the same equipotential.",
"1, 2, 3, and 4 all lie on the same equipotential since the electric field is uniform."
] | |||||||||
Physics | Below is shown a section near the center of a parallel plate capacitor. There are 4 labeled positions between the plates shown as A, B, C, and D. Relative to A, which point has the largest potential difference and why?Below is shown a section near the center of a parallel plate capacitor. There are 4 labeled positions between the plates shown as A, B, C, and D. Relative to A, which point has the largest potential difference and why?
| 3 | [
"Point A because the potential difference is infinite when the position between points is 0 m.",
"Point B because it is the same distance from the -Q plate as A.",
"Point C because it is farther in distance from Point A.",
"Point D because it is closest to the +Q Plate."
] | |||||||||
Physics | What is the total work performed on the gas as it is transformed from state a to state c, along the path indicated?What is the total work performed on the gas as it is transformed from state a to state c, along the path indicated?
| 2 | [
"1,500 J",
"3,000 J",
"4,500 J",
"9,500 J"
] | |||||||||
Physics |
The figure above shows a portion of a conduit for water, one with rectangular cross sections. If the flow speed at the top is v, what is the flow speed at the bottom?
| 3 | [
"4v",
"8v",
"12v",
"16v"
] | |||||||||
Physics |
A ball is tied to a string and placed in a container of water as shown. The water is slowly drained from the container until the water level is below the position of the ball shown, but the draining stops while there is still water in the container. The tension in the string is measured while this occurs. Which describes why the tension measurements decrease?
| 3 | [
"The tension decreases because there is less pressure on the ball when the water level drops because of the change in the water depth.",
"The tension decreases because there is less pressure on the ball when the water level drops because the water is moving at a faster speed.",
"The tension decreases because the force of gravity on the ball decreases.",
"The tension decreases because the buoyant force on the ball decreases."
] |
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