chapter 8 RAT Flashcards
When we say electric charge is conserved, we mean that it can
A. be saved, like money in a bank.
B. assume equivalent forms.
C. be neither created nor destroyed.
D. be either created or destroyed, but only in nuclear reactions.
C. be neither created nor destroyed
When a pair of charged particles are brought twice as close to each other, the force between them becomes
A. twice as strong.
B. four times as strong.
C. half as strong.
D. one-quarter as strong.
B. four times as strong
An electric field surrounds all
A. electrons.
B. protons.
C. both of these
D. neither of these
C. both of these
Electric potential and electric potential energy are
A. one and the same in most cases.
B. two terms for the same concept.
C. both of these
D. neither of these.
D. neither of these
Which statement(s) is(are) correct?
A. Voltage flows in a circuit.
B. Charge flows in a circuit.
C. A battery is the source of electrons in a circuit.
D. All are correct.
B. Charge flows in a circuit.
When you double the voltage in a simple electric circuit, you double the
A. current.
B. resistance.
C. both of these
D. neither of these
A. current
When you double both the current and the voltage in a circuit, the power
A. remains unchanged if the resistance remains constant.
B. halves.
C. doubles.
D. quadruples.
D. quadruples
In a simple circuit consisting of a single lamp and a single battery, when the current in the lamp is 2 amperes (A), the current in the battery is
A. 1 A.
B. 2 A.
C. dependent on internal battery resistance.
D. There is not enough information for us to say.
B. 2 A
In a circuit with two lamps in parallel, if the current in one lamp is 2 amperes (A), the current in the battery is
A. 1 A.
B. 2 A.
C. more than 2 A.
D. There is not enough information for us to say.
C. more than 2 A
What is the power rating of a lamp connected to a 12-V source when it carries 2.5 A?
A. 4.8 W
B. 14.5 W
C. 30 W
D. none of these
C. 30 W
