AC and DC Flashcards

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1
Q

direct current is obtained from what?

A

a circuit containing a battery

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2
Q

what is direct current?

A

a steady, constantly flowing current that flows in the same direction in a circuit from positive to negative

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3
Q

a DC power supply has what type of terminals?

A

fixed positive and negative terminals

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4
Q

AC is obtained from what?

A

a generator- a coil rotating in a magnetic field

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5
Q

what is AC defined as?

A

a current that continuously changes its direction going back and forth around a circuit

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6
Q

what does AC power supply have with terminals?

A

2 identical terminals that switch between positive and negative

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7
Q

AC comes from what electricity supply?

A

the mains

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