Home - Basic Electrical Engineering - Alternating Voltage and Current

Alternating Voltage and Current Online Exam Quiz

Important questions about Alternating Voltage and Current. Alternating Voltage and Current MCQ questions with answers. Alternating Voltage and Current exam questions and answers for students and interviews.

Which, among the following, is the correct expression for alternating emf generated?

Options

A : a. e=2Blvsin(?)

B : b. e=2B²lvsin(?)

C : c. e=Blvsin(?)

D : d. e=4Blvsin(?)

What should theta be in order to get maximum emf?

Options

A : a. 0°

B : b. 90°

C : c. 180°

D : d. 45°

Calculate the maximum emf when the velocity is 10m/s, the length is 3m and the magnetic field density is 5T.

Options

A : a. 150V

B : b. 100V

C : c. 300V

D : d. 0V

When a coil is rotated in a magnetic field, the emf induced in it?

Options

A : a. Is maximum

B : b. Is minimum

C : c. Continuously varies

D : d. Remains constant

emf is zero if the angle between velocity and length is _____

Options

A : a. 0°

B : b. 90°

C : c. 270°

D : d. 45°

In an A.C. generator, increase in number of turns in the coil _________

Options

A : a. Increases emf

B : b. Decreases emf

C : c. Makes the emf zero

D : d. Maintains the emf at a constant value

The number of cycles that occur in one second is termed as ___________

Options

A : a. Waveform

B : b. Frequency

C : c. Amplitude

D : d. Period

The variation of a quantity such as voltage or current shown on a graph is known as ___________

Options

A : a. Waveform

B : b. Peak value

C : c. Instantaneous value

D : d. Period

What is the duration of one cycle known as _________

Options

A : a. Waveform

B : b. Peak value

C : c. Instantaneous value

D : d. Period

The repetition of a variable quantity, recurring at equal intervals, is known as ___________

Options

A : a. Waveform

B : b. Instantaneous value

C : c. Cycle

D : d. Period

The value of a given waveform at any instant time is termed as ___________

Options

A : a. Waveform

B : b. Instantaneous value

C : c. Cycle

D : d. Period

The maximum instantaneous value measured from zero value is known as?

Options

A : a. Peak value

B : b. Peak to peak value

C : c. Cycle

D : d. Period

The maximum variation between the maximum positive and the maximum negative value is known as?

Options

A : a. Peak value

B : b. Peak to peak value

C : c. Cycle

D : d. Period

What is the correct relation between the peak value and peak to peak value for a sinusoidal waveform?

Options

A : a. Vp=4Vp-p

B : b. Vp=Vp-p

C : c. Vp-p=2Vp

D : d. Vp=2Vp-p

If the peak to peak voltage is 10V, calculate the peak voltage.

Options

A : a. 10V

B : b. 2V

C : c. 4V

D : d. 5V

If the peak voltage is 9V, calculate the peak to peak voltage.

Options

A : a. 9V

B : b. 20V

C : c. 18V

D : d. 12V

The waveform of the emf generated undergoes one complete cycle when?

Options

A : a. Conductors move past north pole

B : b. Conductors move past south pole

C : c. Conductors move past north and south poles

D : d. Conductors are stationary

When is the shape of the negative half of the emf waveform equal to the positive half?

Options

A : a. When the conductors move past north pole

B : b. When conductors move past south pole

C : c. When conductors move past both north and south pole

D : d. When conductors are stationary

Which is the correct formula for frequency in an ac generator?

Options

A : a. f=p*n

B : b. f=p/n

C : c. f=n/p

D : d. f=n²p

What will happen to the frequency if the number of revolutions increases?

Options

A : a. Increases

B : b. Decreases

C : c. Remains the same

D : d. Becomes zero

Basic Electrical Engineering more Online Exam Quiz

Copyright © 2021
Exam-GK-MCQ-Questions.Com | Contact Us | Privacy Policy | Terms of Use | Sitemap | 0.018265008926392