题目内容

It is conventional to take the current flow as the movement of .

A. negative charges
B. positive charges
C. any charge
D. protons

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Electric current is the time rate of charge, measured in .

A. watts
B. volts
C. joules
D. amperes

The energy required to move a unit charge through an element is .

A. . current
B. . power
C. . voltage
D. . potential

The plus (+) and minus (-) signs in an electric circuit diagram are used to define .

A. . voltage polarity
B. . current direction
C. . power flow
D. . absorbed power

According to the passive sign convention, if the power has a plus sign, power is by the element.

A. supplied
B. absorbed
C. generated
D. transferred