Home
Current Affairs January 2024

What is the correct answer?

4

Which of the following electric quantities is vector in character?

A. Field

B. Charge

C. Energy

D. Potential Difference

Correct Answer :

A. Field


Related Questions

What is the correct answer?

4

The customary energy unit in atomic and nuclear physics is

A. Joule

B. Volt- coulomb

C. electron-volt

D. Walt- second

What is the correct answer?

4

What is the diameter of an atom?

A. About 10^-10 m

B. About 10^-10 cm

C. About 10^-10 mm

D. About 10^-10 �m

What is the correct answer?

4

The ability of a mechanically stressed ferromagnetic wire to recognize rapid switching of magnetization when subjected to a dc magnetic field.

A. Wartheim effect

B. Wiedemann effect

C. Wiegand effect

D. Edison effect

What is the correct answer?

4

Paramagnetic substance has a relative permeability of

A. Slightly less than one

B. Equal to one

C. Slightly equal to one

D. Very much greater than one

What is the correct answer?

4

The physical motion resulting from the forces of magnetic fields is called

A. Motor action

B. Rotation

C. Repulsion

D. Torque action

What is the correct answer?

4

The magnetic potential in a magnetic circuit can be measured in terms of

A. Mmf

B. Emf

C. Farad

D. Coulomb

What is the correct answer?

4

Defined as the number of lines per unit area through any substance in a plane at right angles to the lines of force

A. Flux

B. Flux lines

C. Flux density

D. Flux intensity

What is the correct answer?

4

Electric potential is a _______ quantity.

A. scalar

B. phasor

C. vector

D. variable

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

As the magnetic intensity decreasesa the relative permeability of a magnetic material

A. decreases

B. remains the same

C. increases

D. becomes zero

What is the correct answer?

4

One ampere- turn is equivalent to _____ gilberts

A.

B.

What is the correct answer?

4

Magnetic field intensity is a ________ quantity.

A. scalar

B. phasor

C. vector

D. variable

What is the correct answer?

4

The B-H curve for ________ is a straight line passing through the origin.

A. cobalt

B. air

C. hardened steel

D. soft iron

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 electric field intensity between the parallel plate air capacitor is 20 N/C. If an insulating slab of relative permittivity 5 is placed between the platesa then electric field intensity will be

A. 20 N/C

B. 100 N/C

C. 4N/C

D. 40 N/C

What is the correct answer?

4

The ratio of the total flux (flux in iron path) to the useful flux (flux in air gap)

A. Leakage flux

B. Leakage current

C. Leakage coefficient

D. Leakage factor

What is the correct answer?

4

A negatively charge body has

A. deficit of electrons

B. excess of protons

C. excess of electrons

D. deficit of neutrons

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

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 phenomenon that when an electric current passes through an anisotropic crystala there is an absorption or liberation of heat due to the non-uniformity in current distribution.

A. Bridgman effect

B. Corona effect

C. Dember effect

D. Destriau effect

What is the correct answer?

4

If two similar charges 1 coulomb each are placed 1 m apart in aira then the force of repulsion is

A. 8 × 10^6 N

B. 9 × 10 ^9 N

C. 10^6 N

D. 5 × 10^6 N

What is the correct answer?

4

Which of the following is a paramagnetic material?

A. Carbon

B. Bismuth

C. Copper

D. Oxygen

What is the correct answer?

4

The amount of magnetizing force to counter balance the resid magnetic material is referred to as

A. Reluctivity

B. Susceptivity

C. Coercivity

D. Retentivity

What is the correct answer?

4

What is the value of the absolute permittivity of air?

A. 8.854 F/m

B. 8.854 × 10^-12 mF/m

C. 8.854× 10^-12 F/m

D. 8.854 × 10^-12 F/m

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 emf induced in a coil due to the changing current of another neighboring coil is called

A. Mutually induced emf

B. Self induced emf

C. Statically induced emf

D. Dynamically induced emf

What is the correct answer?

4

The magnetic field around the conductor is determined by the

A. Size of the conductor

B. Amount of current

C. Current divided by the resistance

D. Resistance divided by the current

What is the correct answer?

4

Ohm's law cannot be applied to which material?

A. Copper

B. Silver

C. Silicon carbide

D. Aluminum

What is the correct answer?

4

What is the SI unit of reluctance?

A. At

B. At/m

C. N/Wb

D. At/Wb

What is the correct answer?

4

What type of bond is formed when there exists some form of collective interactions between the (negatively charged) electrons and (positively charged) nuclei in a solid?

A. Ionic

B. Covalent

C. Metallic

D. Van der Waals