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3 June, 21:09

Why does alternating current change direction 50 to 60 times per second?

A) because it is produced by a generator that changes current direction as it spins

B) because magnetic fields from the generator attract and repel the current

C) because it travels at the speed of light back and forth across the circuit

D) because it can only travel a short distance before being attracted back to where it started

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Answers (2)
  1. 3 June, 22:21
    0
    A) because it is produced by a generator that changes current direction as it spins

    Explanation:

    Alternating current has a frequency of around 60 Hz because it is produced by a generator that changes direction as it spins. Every time the arm passes through the magnetic field in the generator, the current changes direction.
  2. 3 June, 23:01
    0
    i'm not sure but i think it might be b.
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