Alternating Current And Voltage

Question: One revolution of a conductor through the magnetic field of a basic generator will produce two complete sine waves.
[A].

True

[B].

False

Answer: Option B

Explanation:

No answer description available for this question.

Question: A sine wave has only one positive maximum point during a cycle.
[A].

True

[B].

False

Answer: Option A

Explanation:

No answer description available for this question.

Question: If a wave has frequency of 2 Hz, it has a period of ?
[A].

1s

[B].

1/2 s

[C].

2.5s

[D].

2s

Answer: Option B

Explanation:

Period is usually 1/Frequency

So, Period = 1/2s.

Question: A 1 Hz sine wave has a period of 1 s.
[A].

True

[B].

False

Answer: Option A

Explanation:

No answer description available for this question.

Question: A single-phase induction motor
[A].

is self-starting

[B].

operates at a fixed speed

[C].

is less reliable than a three-phase synchronous motor

[D].

none of the above

Answer: Option D

Explanation:

No answer description available for this question.

Question: In both induction and synchronous ac motors
[A].

the operating speed is very steady

[B].

the stator magnetic field is stationary

[C].

the stator magnetic field rotates

[D].

the “squirrel cage” forms the rotor

Answer: Option C

Explanation:

No answer description available for this question.