1. Which of the following describes alternating current electricity?

(a) It can be produced by rotating a loop of wire through a magnetic field.

(b) It flows in one direction for a period of time and then reverses direction.

(c) It goes through one cycle when it flows in one direction and then reverses direction.

(d) All of the above.

2. The voltage, e, and the current, i, in an alternating current circuit are in phase when

(a) The peak values of both e and i occur at different times.

(b) The peak values of e and i occur at the same time but their zero values do not.

(c) The peak values and the zero values of e and i occur simultaneously.

(d) None of the above.

3. Which of the following affect the voltage induced in the secondary coil of a transformer?

(a) The current through the primary coil

(b) The resistance of the primary coil

(c) The number of turns in the primary coil

(d) None of the above

4. Which of the following contribute to the energy loss in a transformer?

(a) Resistance of the copper wires

(b) Reversing the magnetic field in the core

(c) Induced currents in the core

(d) The emf in the outside circuit

(e) All of the above

5. Explain the difference between maximum current and effective current.