Question

the electric and magnetic fields vary with time in which of the following fields​

Answer 1

Explanation:

Explanation: The electric and magnetic fields vary with time in oscillating fields. It is certain that such fields are AC fields. Explanation: The power per unit velocity P/v is given by the product of electric field and the density.

Answer 2

Complete question:

The electric and magnetic fields vary with time in which of the following fields:

1. AC
2. DC
3. Static
4. It does not vary with time.​

Answer: The correct answer is option 1) AC.

Explanation:

• Electric and magnetic fields vary with time in Oscillating fields.
• AC current is an example of an oscillating field.

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