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Simple Magnetic Circuits Online Exam Quiz

Important questions about Simple Magnetic Circuits. Simple Magnetic Circuits MCQ questions with answers. Simple Magnetic Circuits exam questions and answers for students and interviews.

What is a permeable substance?

Options

A : a. Any good conductor

B : b. Any bad conductor

C : c. Any strong magnet

D : d. Any substance through which the magnetic lines of force can pass easily

Materials having good retentivity are?

Options

A : a. Strong magnets

B : b. Weak magnets

C : c. Temporary magnets

D : d. Permanent magnets

Magnetic field exists along which of the following?

Options

A : a. Moving charges

B : b. Stationary charges

C : c. Copper

D : d. Iron

Magnetomotive force is equal to__________________

Options

A : a. current * number of turns

B : b. current / number of turns

C : c. current / number of turns per unit length

D : d. current * number of turns per unit length

Unit of MMF is ______________

Options

A : a. A/m

B : b. A-m

C : c. A

D : d. unitless

When a bar magnet is broken into two pieces, which of the following are true?

Options

A : a. The magnet loses its magnetism

B : b. The magnet has only north pole left

C : c. The magnet has only south pole left

D : d. The magnet turns into two new bar magnets

When an electric current flows into the page, what is the direction of the magnetic field?

Options

A : a. Clockwise

B : b. Anti-clockwise

C : c. Cannot be determined

D : d. Parallel to the current

When an electric current flows out of the page, what is the direction of the magnetic field?

Options

A : a. Clockwise

B : b. Anti-clockwise

C : c. Cannot be determined

D : d. Parallel to the current

Permeability of free space is also known as _________

Options

A : a. Magnetic constant

B : b. Electric constant

C : c. Electrostatic constant

D : d. Magnetostatic constant

A substance whose permeability is less than the permeability of free space is?

Options

A : a. Diamagnetic

B : b. Paramagnetic

C : c. Ferromagnetic

D : d. Not a magnetic substance

Which, among the following, have negative susceptibility?

Options

A : a. Diamagnetic

B : b. Paramagnetic

C : c. Ferromagnetic

D : d. Not a magnetic substance

Which, among the following, have positive susceptibility?

Options

A : a. Diamagnetic

B : b. Paramagnetic

C : c. Ferromagnetic

D : d. Both paramagnetic and ferromagnetic

A substance whose permeability is more than the permeability of free space is?

Options

A : a. Diamagnetic

B : b. Paramagnetic

C : c. Ferromagnetic

D : d. Both paramagnetic and ferromagnetic

The unit for permeability of free space is?

Options

A : a. Henry

B : b. Henry-m

C : c. Henry/m

D : d. Henry/m²

Which among the following, is a correct expression for µ?.

Options

A : a. µ?=BH

B : b. µ?=B/H

C : c. µ?=H/B

D : d. µ?=BH²

Calculate the magnetic flux density if the magnetic field strength is 2A/m.

Options

A : a. 4*pi*10¯?T

B : b. 8*pi*10¯?T

C : c. 10*pi*10¯?T

D : d. 12*pi*10¯?T

Calculate the magnetic field strength if the magnetic flux density is 4*piT.

Options

A : a. 10¯?/16*pi²A/m

B : b. 10¯?A/m

C : c. 10?A/m

D : d. 10¯?A

Calculate the magnetic flux density if the magnetic field strength is 3A/m.

Options

A : a. 4*pi*10¯?T

B : b. 8*pi*10¯?T

C : c. 10*pi*10¯?T

D : d. 12*pi*10¯?T

What is the unit for relative permeability?

Options

A : a. H-m

B : b. H/m

C : c. H²/m

D : d. No unit

Which of the following expressions is correct with respect to relative permeability?

Options

A : a. B = µ?µ?/H

B : b. B = µ?µ?H

C : c. B = µ?/µ?H

D : d. B = µ?µ?/H²

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