# Electronic Principles – Section 2

1. Which one of the following statements most accurately applies to the frequency of a waveform?

A. The actual frequency of a sine waveform is 1.41 times the working frequency
B. Unless specified otherwise, the frequency of a waveform is assumed to be 60 Hz
C. The higher the amplitude of a waveform, the higher its frequency
D. The longer the period of a waveform, the lower its frequency
E. None of the above

Correct Answer:  A. The actual frequency of a sine waveform is 1.41 times the working frequency

2. The merging of a free electron and a hole is called

A. Covalent bonding
C. Recombination
D. Thermal energy
E. None of the above

3. One henry of inductance is defined as:

A. the amount of counter emf required to reduce a current to 1 A
B. the amount of inductance required for generating 1 V of counter emf when the current changes at the rate of 1 A per second
C. the amount of inductance required to change the frequency of a current by 1 Hz
D. the number of turns of wire in an inductor multiplied by the amount of current flowing through it
E. None of the above

Correct Answer:  B. the amount of inductance required for generating 1 V of counter emf when the current changes at the rate of 1 A per second

4. The basic unit of measurement for current is the:

A. volt
B. watt
C. ampere
D. ohm
E. None of the above