Question: A sawtooth wave has a period of 10 ms. Its frequency is
[A].10 Hz
50 Hz
100 Hz
1,000 Hz
[A].
[B].
[C].
[D].
Answer: Option C
Explanation:
No answer description available for this question.
Alternating Current And Voltage
A waveform has a baseline of 3 V, a duty cycle of 20%, and an amplitude of 8 V. The average voltage value is
Question: A waveform has a baseline of 3 V, a duty cycle of 20%, and an amplitude of 8 V. The average voltage value is
[A].4 V
4.6 V
1.6 V
11 V
[A].
[B].
[C].
[D].
Answer: Option A
Explanation:
No answer description available for this question.
One revolution of a conductor through the magnetic field of a basic generator will produce two complete sine waves.
Question: One revolution of a conductor through the magnetic field of a basic generator will produce two complete sine waves.
[A].True
False
[A].
[B].
Answer: Option B
Explanation:
No answer description available for this question.
A sine wave with an rms value of 12 V is riding on a dc level of 18 V. The maximum value of the resulting waveform is
Question: A sine wave with an rms value of 12 V is riding on a dc level of 18 V. The maximum value of the resulting waveform is
[A].6 V
30 V
35 V
0 V
[A].
[B].
[C].
[D].
Answer: Option C
Explanation:
No answer description available for this question.
A sine wave has only one positive maximum point during a cycle.
Question: A sine wave has only one positive maximum point during a cycle.
[A].True
False
[A].
[B].
Answer: Option A
Explanation:
No answer description available for this question.
If a wave has frequency of 2 Hz, it has a period of ?
Question: If a wave has frequency of 2 Hz, it has a period of ?
[A].1s
1/2 s
2.5s
2s
[A].
[B].
[C].
[D].
Answer: Option B
Explanation:
Period is usually 1/Frequency
So, Period = 1/2s.
A sinusoidal current has an rms value of 14 mA. The peak-to-peak value is
Question: A sinusoidal current has an rms value of 14 mA. The peak-to-peak value is
[A].45.12 mA
16 mA
39.6 mA
22.6 mA
[A].
[B].
[C].
[D].
Answer: Option C
Explanation:
No answer description available for this question.
A 1 Hz sine wave has a period of 1 s.
Question: A 1 Hz sine wave has a period of 1 s.
[A].True
False
[A].
[B].
Answer: Option A
Explanation:
No answer description available for this question.
A single-phase induction motor
Question: A single-phase induction motor
[A].is self-starting
operates at a fixed speed
is less reliable than a three-phase synchronous motor
none of the above
[A].
[B].
[C].
[D].
Answer: Option D
Explanation:
No answer description available for this question.
In both induction and synchronous ac motors
Question: In both induction and synchronous ac motors
[A].the operating speed is very steady
the stator magnetic field is stationary
the stator magnetic field rotates
the “squirrel cage” forms the rotor
[A].
[B].
[C].
[D].
Answer: Option C
Explanation:
No answer description available for this question.