ALTERNATING CURRENT AND VOLTAGE QUIZ

A signal with a 400 s period has a frequency of

25,000 Hz

250 Hz

2,500 Hz

400 Hz

TRUE ANSWER : ?
YOUR ANSWER : ?

How many degrees are there in /3 rad?

27°

180°

6°

60°

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 : ?

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

14.14 V

6.37 V

50.96 V

25.48 V

TRUE ANSWER : ?
YOUR ANSWER : ?

If a sine wave goes through 10 cycles in 20 s, the period is

20 s

100 s

4 s

2 s

TRUE ANSWER : ?
YOUR ANSWER : ?

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

10 mA

1 mA

1.5 mA

15 mA

TRUE ANSWER : ?
YOUR ANSWER : ?

If the peak of a sine wave is 13 V, the peak-to-peak value is

13 V

6.5 V

26 V

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

A phasor represents

the magnitude and a quantity direction

the magnitude of a quantity

the phase angle

the width of a quantity

TRUE ANSWER : ?
YOUR ANSWER : ?

A sine wave with a period of 4 ms is changing at a faster rate than a sine wave with a period of

0.0045 s

3,000 s

2 ms

1.5 ms

TRUE ANSWER : ?
YOUR ANSWER : ?

Two series resistors are connected to an ac source. If there are 7.5 V rms across one resistor and 4.2 V rms across the other, the peak source voltage is

10.60 V

1.65 V

16.54 V

5.93 V

TRUE ANSWER : ?
YOUR ANSWER : ?

↑