2. Which of the following statements is true? A) B) C) Electromagnetic waves are

Question

2. Which of the following statements is true? A) B) C) Electromagnetic waves are longitudinal waves. The electric and magnetic fields are out of phase in an electromagnetic wav The electric- and magnetic-field vectors E and B are equal in magnitude in an electromagnetic wave. Maxwell's equations apply only to fields that are constant in time. None of these statements is true. D) E) 3. How much does the maximum EMF produced by a generator (a rotating coil) change if the number of turns of the coil is tripled? A) it is impossible to tell given the information provided B) it is reduced by one-third C) it is the same D) it is increased by a factor of nine E) it is tripled

Explanation / Answer

2. E None are true.

3. E

It gets tripled because flux now intercepts triple area.

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