A hollow METALLIC sphere has an inner radius A and an outer radius B. If charge is placed on the inner surface, that is at radius A, where is the charge located after it has come to rest?

Q-1: A hollow METALLIC sphere has an inner radius A and an outer radius B. If charge is placed on the inner surface, that is at radius A, where is the charge located after it has come to rest?

ANSWER: ON THE SPHERE'S OUTER SURFACE or OUTSIDE RADIUS B

Q-2:  Two parallel wires carrying currents in opposite directions will:

1) attract each other
2) repel each other
3) cause an electric arc to form
4) not affect each other
ANSWER: 2 -- REPEL EACH OTHER

Q-3:  In an electromagnetic wave, the ratio of the magnitudes of the electric field to the magnet field is equal to what?

ANSWER: THE SPEED OF LIGHT or C

Q-4:  Suppose the power of a prescription lens is 4 diopters. What is the focal length of the lens?

ANSWER: = 25 CENTIMETERS

Q-5:  Assuming all other parameters remain constant, what happens to the pressure of a gas when the volume of the gas is increased?

1) increases
2) decreases
3) fluctuates sinusoidally
4) remains the same
ANSWER: 2 -- DECREASES

Q-6:  If a metallic object is heated, its density generally:

1) increases
2) decreases
3) fluctuates randomly
4) remains the same
ANSWER: 2 -- DECREASES

Q-7:  Which wave has the highest frequency?

1) microwaves
2) infrared waves
3) ultraviolet waves
4) radio waves
ANSWER: 3 -- ULTRAVIOLET WAVES

Q-8:  The characteristic that distinguishes a laser beam from an ordinary light beam is:

1) the greater frequency of the laser beam
2) the coherence of the laser beam
3) the color of the laser beam
4) the greater polarization of the laser beam
ANSWER: 2 -- THE COHERENCE OF THE LASER BEAM

Q-9:  The mass spectrograph directly yields a value for which one of the following?

1) mass of a photon
2) mass of a neutron
3) masses of isotopes of elements
4) mass to charge ratio of ions
ANSWER: 4 -- MASS TO CHARGE RATIO OF IONS