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w) They have the same masses but different charges
x) They have the same charges but different masses
y) The products of their charges and their masses are equal
z) The ratios of their charges to their masses are equal
ANSWER: Z -- THE RATIOS OF THEIR CHARGES TO THEIR MASSES ARE EQUAL
372: A capacitor and a coil are connected in series. The capacitor is charged and allowed to discharge through the coil. The current that will then flow through the capacitor-coil combination will do one of the following things. Will it:
w) Flow in one direction, beginning at a maximum and decreasing rapidly to zero
x) Oscillate indefinitely
y) Oscillate but diminish steadily to zero
z) Oscillate at high frequency at first but then at slower frequency
ANSWER: Y -- OSCILLATE BUT DIMINISH STEADILY TO ZERO
373: The energy associated with one photon of a light beam is proportional to one of the following. Is it proportional to?
w) The intensity of the light source from which it came
x) The number of photons in the beam
y) The frequency of the photon
z) The speed of the photon
ANSWER: Y -- THE FREQUENCY OF THE PHOTON
374: When a certain beam of light falls upon a metal surface, it ejects photoelectrons from it. The number of photoelectrons ejected per second by the beam of light depends upon one of the following. Is it proportional to?
w) The threshold frequency of the metal
x) The work function of the metal
y) The frequency of the beam
z) The intensity of the beam
ANSWER: Z -- THE INTENSITY OF THE BEAM
375: In Rutherford's experiment involving the deflection of alpha particles by atomic nuclei, the fact that some of the alpha particles bombarding the thin gold foil were back-scattered, led to one of the following conclusions. It was concluded that:
w) The charge of an electron is negative
x) The nucleus of a gold atom carries all its charge
y) Most of the mass of a gold atom is in its nucleus
z) The nucleus of a gold atom occupies nearly the entire space of the atom
ANSWER: Y -- MOST OF THE MASS OF A GOLD ATOM IS IN ITS NUCLEUS
376: Standing waves are formed when two sets of waves of equal amplitude and frequency
w) Are in phase
x) Are in opposite phase
y) Move through each other in opposite directions
z) Are reflected from the same surface
ANSWER: Y -- MOVE THROUGH EACH OTHER IN OPPOSITE DIRECTIONS
377: The common-emitter transistor circuit can amplify a small current signal because a small change in the signal current produces one of the following. Does the change in signal produce a large change in the:
w) emitter-base voltage
x) Base current
y) Collector current
z) Collector voltage
ANSWER: Y -- COLLECTOR CURRENT
378: The binding energy of a nucleus is defined as one of the following. Is this definition:
w) The energy equivalent to its mass
x) The mass difference between its neutrons and protons
y) The energy needed to remove a neutron from the nucleus
z) The difference between the mass of the nucleus and the sum of the masses of its protons and neutrons
ANSWER: Z -- THE DIFFERENCE BETWEEN THE MASS OF THE NUCLEUS AND THE UM
379: In the equation of a nuclear reaction, all but one of the following quantities are equal to each other on both sides of the equation. Which quantity is NOT conserved:
w) The net electric charge
x) The total mass-energy
y) The number of protons
z) The number of nucleons
ANSWER: Y -- THE NUMBER OF PROTONS
380: Which of the following terms refer to the amount of heat needed to raise the temperature of a unit mass of a substance through one degree?
w) Heat of fusion
x) Liquefaction heat
y) Internal heat
z) Specific heat
ANSWER: Z -- SPECIFIC HEAT
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