Alternating Current And Voltage Archives

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

Question: If a sine wave goes through 10 cycles in 20 s, the period is
[A].

20 s

[B].

4 s

[C].

2 s

[D].

100 s

Answer: Option C

Explanation:

No answer description available for this question.

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

Most practical alternators generate electricity from

Alternating Current And Voltage, Electronics / admin

Question: Most practical alternators generate electricity from
[A].

a coil rotating within a magnetic field

[B].

a magnetic field rotating around fixed windings

[C].

a permanent magnet rotating within a varying electromagnetic field

[D].

none of the above

Answer: Option B

Explanation:

No answer description available for this question.

Most practical alternators generate electricity from Read More »

Alternating Current And Voltage, Electronics

A signal with a 400 s period has a frequency of

Alternating Current And Voltage, Electrical Engineering / admin

Question: A signal with a 400 s period has a frequency of
[A].

250 Hz

[B].

2,500 Hz

[C].

25,000 Hz

[D].

400 Hz

Answer: Option B

Explanation:

No answer description available for this question.

A signal with a 400 s period has a frequency of Read More »

Alternating Current And Voltage, Electrical Engineering

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

Alternating Current And Voltage, Electrical Engineering / admin

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

25%

[B].

50%

[C].

[D].

100%

Answer: Option A

Explanation:

No answer description available for this question.

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

Alternating Current And Voltage, Electrical Engineering

A rectangular wave that has a duty cycle of 50% could be called a

Alternating Current And Voltage, Electronics / admin

Question: A rectangular wave that has a duty cycle of 50% could be called a
[A].

“c” wave

[B].

sawtooth wave

[C].

square wave

[D].

triangular wave

Answer: Option C

Explanation:

No answer description available for this question.

A rectangular wave that has a duty cycle of 50% could be called a Read More »

Alternating Current And Voltage, Electronics

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

Alternating Current And Voltage, Electrical Engineering / admin

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

is 1%

[B].

is 30%

[C].

is 100%

[D].

cannot be determined

Answer: Option B

Explanation:

No answer description available for this question.

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

Alternating Current And Voltage, Electrical Engineering

A half-cycle average voltage of 12 V is equal to what rms voltage?

Alternating Current And Voltage, Electronics / admin

Question: A half-cycle average voltage of 12 V is equal to what rms voltage?
[A].

13.33 V

[B].

8.48 V

[C].

18.84 V

[D].

7.64 V

Answer: Option A

Explanation:

No answer description available for this question.

A half-cycle average voltage of 12 V is equal to what rms voltage? Read More »

Alternating Current And Voltage, Electronics

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

Alternating Current And Voltage, Electrical Engineering / admin

Question: If the rms voltage drop across a 15 k resistor is 16 V, the peak current through the resistor is
[A].

15 mA

[B].

1.5 mA

[C].

10 mA

[D].

1 mA

Answer: Option B

Explanation:

No answer description available for this question.

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

Alternating Current And Voltage, Electrical Engineering

If the rms current through a 4.7 k resistor is 4 mA, the peak voltage drop across the resistor is

Alternating Current And Voltage, Electrical Engineering / admin

Question: If the rms current through a 4.7 k resistor is 4 mA, the peak voltage drop across the resistor is
[A].

4 V

[B].

18.8 V

[C].

26.6 V

[D].

2.66 V

Answer: Option C

Explanation:

No answer description available for this question.

If the rms current through a 4.7 k resistor is 4 mA, the peak voltage drop across the resistor is Read More »

Alternating Current And Voltage, Electrical Engineering

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

Alternating Current And Voltage, Electrical Engineering / admin

Question: If the rms current through a 6.8 k resistor is 8 mA, the rms voltage drop across the resistor is
[A].

5.44 V

[B].

54.4 V

[C].

7.07 V

[D].

8 V

Answer: Option B

Explanation:

No answer description available for this question.

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

Alternating Current And Voltage, Electrical Engineering