ALTERNATING CURRENT AND VOLTAGE QUIZ

If the rms voltage drop across a 15 k resistor is 16 V, the peak current through the resistor is

10 mA

1.5 mA

1 mA

15 mA

TRUE ANSWER : ?
YOUR ANSWER : ?

A pulse waveform has a high time of 8 ms and a pulse width of 32 ms. The duty cycle is

100%

50%

1%

25%

TRUE ANSWER : ?
YOUR ANSWER : ?

Sine wave A has a positive-going zero crossing at 45°. Sine wave B has a positive-going zero crossing at 60°. Which of the following statements is true?

Wave A leads wave B by 15°.

Wave A lags wave B by 105°.

Wave A leads wave B by 105°.

Wave A lags wave B by 15°.

TRUE ANSWER : ?
YOUR ANSWER : ?

A sawtooth wave has a period of 10 ms. Its frequency is

100 Hz

10 Hz

50 Hz

1,000 Hz

TRUE ANSWER : ?
YOUR ANSWER : ?

A sinusoidal current has an rms value of 14 mA. The peak-to-peak value is

39.6 mA

45.12 mA

16 mA

22.6 mA

TRUE ANSWER : ?
YOUR ANSWER : ?

The average half-cycle value of a sine wave with a 40 V peak is

50.96 V

14.14 V

25.48 V

6.37 V

TRUE ANSWER : ?
YOUR ANSWER : ?

If the rms current through a 6.8 k resistor is 8 mA, the rms voltage drop across the resistor is

54.4 V

7.07 V

8 V

5.44 V

TRUE ANSWER : ?
YOUR ANSWER : ?

When a sine wave has a frequency of 100 Hz in 12 s it goes through

1/100 cycle

120 cycles

12 cycles

1,200 cycles

TRUE ANSWER : ?
YOUR ANSWER : ?

A 20 kHz pulse waveform consists of pulses that are 15 s wide. The duty cycle

is 30%

is 100%

is 1%

cannot be determined

TRUE ANSWER : ?
YOUR ANSWER : ?

One sine wave has a positive-going zero crossing at 15° and another sine wave has a positive-going zero crossing at 55°. The phase angle between the two waveforms is

None of these

40°

45°

0°

TRUE ANSWER : ?
YOUR ANSWER : ?

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