Multiple Choice
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Use the following information to answer the next two questions:
A
transformer has 500 turns on its primary coil and 200 turns on its secondary coil.
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1.
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If the input voltage is 100 volts, what is the output voltage?
A) | 40 volts | B) | 250 volts | C) | 100
volts | D) | 500 volts |
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2.
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If the current through the primary coil is 0.50 A, what is the current through
the secondary coil?
A) | 0.50 | B) | 1.0 A | C) | 0.20
A | D) | 1.25 A |
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3.
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A negatively charged body has
A) | lost protons | B) | gained electrons | C) | gained
protons | D) | lost electrons |
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4.
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The half-life of a radionuclide is 12 years. How long does it take for a
sample of this radionuclide to decay from 80 g to 10 g?
A) | 24 years | B) | 48 years | C) | 4
years | D) | 36 years |
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5.
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What type of energy conversion does a generator perform?
A) | mechanical energy into chemical energy | B) | electrical energy into mechanical
energy | C) | chemical energy into mechanical energy | D) | mechanical energy into electrical
energy |
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6.
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Which of the following is an isotope of  ?
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7.
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The current running through a 60-watt lamp powered by a 120-volt source
is
A) | 90 A | B) | 2 A | C) | 7200
A | D) | 0.5 A |
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8.
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What happens to the atomic number (Z) and mass number (A) of a nuclide after an
alpha decay?
A) | Z decreases by 1; A is unchanged | B) | Z decreases by 2; A decreases by
4 | C) | Z increases by 2; A increases by 4 | D) | Z increases by 1; A is
unchanged |
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9.
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Which of the following correctly describes the subatomic particles of a zinc
atom (Z=30, A=65)
A) | 35 protons; 30 neutrons; 30 electrons | B) | 30 protons; 35 neutrons; 35
electrons | C) | 30 protons; 65 neutrons; 30 electrons | D) | 30 protons; 35 neutrons; 30
electrons |
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10.
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The idea of the atomic nucleus was investigated experimentally by
A) | Curie | B) | Rutherford | C) | Bohr | D) | Becquerel |
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11.
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One difference between electric charges and magnetic poles is that
A) | magnetic poles do not create magnetic fields. | B) | opposite magnetic
poles repel. | C) | one magnetic pole cannot create magnetic poles in other
materials. | D) | a magnetic pole cannot be ioslated. |
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12.
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When  undergoes beta decay, what is the identity of the
daughter nuclide?
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13.
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Three resistors of 4, 6, and 10 ohms are connected in series to a 12-volt
battery. The current flowing through this circuit is
A) | 1.67 A | B) | 240 A | C) | 20
A | D) | 0.6 A |
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14.
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Two equal positive charges are placed equal distance from another positive
charge. What force does the middle positive charge experience?
A) | A net force to the left | B) | A net force to the right | C) | a zero net
force | D) | none of the above |
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15.
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Two resistors of 4 and 6 ohms are connected in parallel. The total
resistance of this cirucuit is
A) | 2.4 ohms | B) | 4.8 ohms | C) | 2.0
ohms | D) | 3.6 ohms |
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