Home
Current Affairs January 2024

What is the correct answer?

4

Steel is hard to magnetize because of its

A. Low permeability

B. High permeability

C. High density

D. High retentivity

Correct Answer :

A. Low permeability


Related Questions

What is the correct answer?

4

How much is the flux in Weber in the above problem?

A. 2 x 10^-5

B. 2 x 10^-3

C. 2 x 10^5

D. 2 x 10^3

What is the correct answer?

4

A principle that states that only two electrons with different spins are allowed to exist in a given orbit

A. Bohr's principle

B. Pauli exclusion principle

C. Avogadro's principle

D. Coulomb's principle

What is the correct answer?

4

The relative permeability of a magnetic material is 10^5. What is its permeability?

A. 4 × 10^5 H/m

B. 4 × 10^-12 H/m

C. 4× 10^-2 H/m

D. 4 × 10^7H/m

What is the correct answer?

4

Who discovered superconductivity in 1911?

A. Kamerlingh Onnes

B. Alex Muller

C. GeoryBednorz

D. Charles Coulomb

What is the correct answer?

4

Flux density is measured in

A. Tesia

B. Weber

C. Ampere- turn

D. Maxwell

What is the correct answer?

4

Who discovereda the relationship between magnetism and electricity that serves as the foundation for the theory of electromagnetism?

A. Luigi Galvani

B. Hans Christian Oersted

C. Andre Ampere

D. Charles Coulomb

What is the correct answer?

4

The energy stored in an electrostatic field or electromagnetic field is called

A. Electromagnetic energy

B. Kinetic energy

C. Potential energy

D. R est energy

What is the correct answer?

4

If the value of 25 of a conductor is 1/230 per oCa then the value of 0is

A. 1/180 peroC

B. 1/150 per oC

C. 1/280 per oC

D. 1/230 per oC

What is the correct answer?

4

The direction of force o a current carrying conductor placed in a m found by

A. Cork screw rule

B. Fleming's left hand rule

C. Fleming's right hand rule

D. using a compass

What is the correct answer?

4

The force between two magnetic poles varies with the distance between them. The variation is ______ to the square of that distance.

A. Equal

B. Greater than

C. Directly proportional

D. Inversely proportional

What is the correct answer?

4

The electric flux density is a ________ quantity.

A. phasor

B. vector

C. scalar

D. variable

What is the correct answer?

4

An effect which is generally used in the gausameter to measure flux density.

A. Skin effect

B. Magnetic effect

C. Hall effect

D. Flywheel effect

What is the correct answer?

4

The electric potential across part AB of a circuit is 5 V; point A being at higher potential. If a charge of 5 Cmoves from A to Ba then energy released as

A. 5 joules

B. 25 joules

C. 10 joules

D. 100 joules

What is the correct answer?

4

A magnetic material losses its ferromagnetic properties at a point called

A. Curie temperature

B. Inferred absolute temperature

C. Room temperature

D. Absolute temperature

What is the correct answer?

4

All matters (gasa liquid and solid) are composed of

A. Neutrons

B. Particles

C. Electrons

D. Atoms

What is the correct answer?

4

The ability of a material to conduct magnetic flux through it.

A. Permittivity

B. Reluctivity

C. Conductivity

D. Permeability

What is the correct answer?

4

The straight line passing through the two poles of magnet is called

A. Real axis

B. Cartesian axis

C. Magnetic axis

D. Imaginary axis

What is the correct answer?

4

Hysteresis is a phenomenon of _________ in a magnetic circuit.

A. setting up constant flux

B. lagging of H behind B

C. lagging B behind H

D. leading B ahead H

What is the correct answer?

4

The electrons in the last orbit of an atom are called _______ electrons.

A. free

B. valence

C. bound

D. thermionic

What is the correct answer?

4

Who discovered the most important electrical effects which is the magnetic effect?

A. Hans Christian Oersted

B. Sir Charles Wheatstone

C. Georg Ohm

D. James Clerk Maxwell

What is the correct answer?

4

A t/m is a unit of

A. Mmf

B. Emf

C. Reluctance

D. Magnetizing force

What is the correct answer?

4

Which of the following is used by temporary magnets as the magnetic material?

A. Hardened steel

B. Cobalt steel

C. Soft iron

D. Tungsten steel

What is the correct answer?

4

Which of the following materials has the least hysteresis loop area?

A. soft iron

B. silicon steel

C. hard steel

D. wrought iron

What is the correct answer?

4

What is the practical unit of electrical energy?

A. Watt

B. Kilowatt-hour

C. Kilowatt-second

D. Megawathour

What is the correct answer?

4

Gases whose particles are charged are known as

A. Conductors

B. Insulators

C. Gaseous Conductors

D. Plasma

What is the correct answer?

4

The property of a material which opposes the creation of magnetic flux in it

A. Resistance

B. Reluctance

C. Permeance

D. Conductance

What is the correct answer?

4

The diameter of a hydrogen atom is approximately ______ cm.

A. 1.1 x 10^-6

B. 1.1 x 10^7

C. 1.1 x 10^-8

D. 1.1 x 10^-9

What is the correct answer?

4

A 6- V battery is connected across a solenoid of 100 turns having a resistance of 2 ?a Calculate the number of ampere turns?

A.

B.

What is the correct answer?

4

At/m is a unit of

A. mmf

B. magnetic force

C. reluctance

D. magnetic flux density

What is the correct answer?

4

Which of the following is a paramagnetic material?

A. Carbon

B. Copper

C. Bismuth

D. Oxygen