Identical 2.0-?C charges are located on the vertices of a square with sides that are 2.0 m in length. Determine the electric potential (relative to zero at infinity) at the center of the square.
A. 38 kV
B. 51 kV
C. 76 kV
D. 64 kV
E. 13 kV
Answer: B
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A car is traveling with a constant speed when the driver suddenly applies the brakes, giving the car a deceleration of 3.50 m/s2. If the car comes to a stop in a distance of 30.0 m, what was the car's original speed?
A) 10.2 m/s B) 14.5 m/s C) 105 m/s D) 210 m/s E) 315 m/s
Coulomb's Law: Two identical small charged spheres are a certain distance apart, and each one initially experiences an electrostatic force of magnitude F due to the other. With time, charge gradually diminishes on both spheres by leaking off. When each of the spheres has lost half its initial charge, what will be the magnitude of the electrostatic force on each one?
A. 1/16 F
B. 1/8 F
C. 1/4 F
D. 1/2 F
E. 1/
F
A charged particle (mass = M, charge = Q> 0) moves in a region of space where the magnetic field has a constant magnitude of B and a downward direction. What is the magnetic force on the particle at an instant when it is moving horizontally toward the north with a speed V?
A. QVB toward the east B. Zero C. QVB toward the west D. QVB upward E. QVB toward the south
Light with a frequency of 8.70 × 1014 Hz is incident on a metal that has a work function of 2.8 eV. What is the maximum kinetic energy that a photoelectron ejected in this process can have?
A) 8.71 × 10-19 J B) 3.11 × 10-19 J C) 1.28 × 10-19 J D) 2.41 × 10-19 J E) 4.52 × 10-19 J