Home
Current Affairs January 2024

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

Correct Answer :

B. Reluctance


Related Questions

What is the correct answer?

4

The evaporation of electrons from a heated surface is called

A. Radiation

B. Convection

C. Thermionic emission

D. Conduction

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

An alloy of 40 percent iron and 60 percent nickel.

A. Alnico

B. Permalloy

C. Hipernik

D. Manganin

What is the correct answer?

4

If the value of 0 a conductor is 1/234 per oCa then the value of 18is

A. 1/218 per oC

B. 1/252 peroC

C. 1/272 per oC

D. 1/273 per oC

What is the correct answer?

4

A positively charged body has

A. deficit of electrons

B. excess of neutrons

C. excess of electrons

D. deficit of protons

What is the correct answer?

4

The space outside the magnet where its pole have a force of attraction or repulsion on a magnetic pole is called

A. Magnetic field

B. Electric field

C. Electromagnetic field

D. Free Space Field

What is the correct answer?

4

The emission of electrons from hot bodies is called

A. Radiation effect

B. Edison effect

C. Skin effect

D. Half effect

What is the correct answer?

4

The uncharged particles which have no effect on its atomic charge.

A. Nucleons

B. Electrons

C. Protons

D. Neutrons

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

A law that states that the current in a thermionic diode varies directly with the three- halves power of anode voltage and inversely with the square of the distance between the electrodesa provided operating conditions are such that the current is limited only by the space charge.

A. Hall's law

B. Joule's law

C. Child's law

D. Coulomb's law

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

__________ is a substance of whose molecules consist of the same kind of atom.

A. Mixture

B. Compound

C. Element

D. Isotope

What is the correct answer?

4

Define as that pole which when placed in air from a similar and equal pole repels it with a force of newtons

A. North pole

B. South pole

C. Unit pole

D. Magnetic pole

What is the correct answer?

4

The magnetic materials should have a large hysteresis loss for one of the following applications.

A. Transformers

B. ACmotors

C. Permanent Magnets

D. DC generators

What is the correct answer?

4

Ohm's law can be used only to a _____ circuit or component.

A. Unilateral

B. Exponential

C. Trivalent

D. Linear

What is the correct answer?

4

A negative ion results when an atom gains an additional

A. Electron

B. Proton

C. Neutron

D. Atom

What is the correct answer?

4

Electrons at the outer shell are called

A. Outer shell electrons

B. Inner shell electrons

C. Semiconductor electrons

D. Valence electrons

What is the correct answer?

4

The electric potential at a point in air due to a charge is 21 V. If the air is replaced by a medium of relative permittivity of 3a then electric potential at that point will be

A. 63 V

B. 21 V

C. 7 V

D. 42 V

What is the correct answer?

4

When the relative permeability of a material is slightly less than 1a it is called _____ material.

A. diamagnetic

B. ferromagnetic

C. paramagnetic

D. non-magnetic

What is the correct answer?

4

One weber of flux is equal to _______ magnetic lines of force.

A. 10^6

B. 10^10

C. 4 × 10^7

D. 10^8

What is the correct answer?

4

When a wire loop is rotated in a magnetic field the direction of the induced emf changes one in every _______ revolution

A.

B.

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

The magnetic flux of 2000 lines is how many Maxwells?

A.

B.

What is the correct answer?

4

One oersted (Oe) is equivalent to _____ Gb/cm.

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

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

Germanium atom has ______ protons and ______ electrons.

A. 32, 32

B. 32, 42

C. 42, 32

D. 34, 34

What is the correct answer?

4

States that the ratio of the thermal conductivity is proportional to the absolute temperature for all metals.

A. Wien's displacement law

B. Hartleys law

C. Hall's law

D. Wiedemann Franz law

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

Magnetic field intensity is a ________ quantity.

A. scalar

B. phasor

C. vector

D. variable