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4

Hydrogen is an example of a _____ material.

A. Paramagnetic

B. Diamagnetic

C. Ferromagnetic

D. N on- magnetic

Correct Answer :

B. Diamagnetic


Related Questions

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4

Whenever a flux inking a coil or current changesa an emf is induced in it. This is known as

A. Joule's Law

B. Coulomb's Law

C. Faraday's first law of electromagnetic induction

D. Faraday's second law of electromagnetic induction

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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

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4

Why is it that the magnitude of magnetomotive force required for air gap is much greater than that required for iron part of a magnetic circuit?

A. Because air is a gas

B. Because air has the highest relative permeability

C. Because air is a conductor of magnetic flux

D. Because air has the lowest relative permeability

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4

When the current flowsa the magnetic field ��. conductor is in what direction?

A. The same as the current direction

B. Opposite the current direction

C. Omnidirectional

D. In the direction determined by the left hand rule

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4

If you hold the conductor with right hand so that the stretched thumb points in the direction of the currenta then encircling fingers will give the direction of magnetic lines of force round the conductor. This is known as

A. Left hand cork screw rule

B. Right hand cork screw rule

C. Left hand rule

D. Right hand rule

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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

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4

The contribution to the ionization in an ionization chamber by electrons liberated from t he walls.

A. Skin effect

B. Walt effect

C. Hall effect

D. Edison effect

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4

The force of attraction or repulsion between two magnetic poles is directly proportional to their strengths.

A. Newton's first law

B. Faraday's first law of electromagnetic induction

C. Coulomb's first law

D. Coulomb's second law

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4

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

A. Nucleons

B. Electrons

C. Protons

D. Neutrons

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The phenomenon by which a magnetic substance becomes a magnet when it is place near a magnet

A. Magnetic effect

B. Magnetic phenomenon

C. Magnetic induction

D. Electromagnetic induction

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Who demonstrated the theory of electromagnetic induction in 1831?

A. Michael Faraday

B. Andre Ampere

C. James Clerk Maxwell

D. Charles Coulomb

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4

The dielectric constant of most materials lies between

A. 1 and 10

B. 10 and 20

C. 20 and 50

D. 50 and 100

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4

A substance that attracts pieces iron

A. Conductor

B. Semiconductor

C. Magnet

D. All of the above

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All matters (gasa liquid and solid) are composed of

A. Neutrons

B. Particles

C. Electrons

D. Atoms

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It is the reciprocal of reluctance and implies the case of readiness with which magnetic flux is developed.

A. R esistance

B. Conductance

C. Permeance

D. I nductance

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4

What is the practical unit of electrical energy?

A. Watt

B. Kilowatt-hour

C. Kilowatt-second

D. Megawathour

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4

The lagging effect between flux density of the material and the magne

A. Permeance

B. Eddy current

C. Hysteresis

D. R eluctance

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4

The magnetic flux of 2000 lines is how many Maxwells?

A.

B.

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Permanent magnets can be found in

A. electric bells

B. earphones

C. relays

D. dy namic loudspeakers

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4

Hydrogen is an example of a _____ material.

A. Paramagnetic

B. Diamagnetic

C. Ferromagnetic

D. N on- magnetic

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4

What determines the atomic number of an element?

A. The number of protons

B. The number of electrons

C. The number of neutrons

D. The number of neutrons and protons

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4

There are how many compounds available in nature?

A.

B.

C. 300a000

D. Unlimited

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4

Which of the following materials has permeability slightly less than that of free space?

A. Paramagnetic

B. Non- magnetic

C. Ferromagnetic

D. Diamagnetic

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4

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

A. Resistance

B. Reluctance

C. Permeance

D. Conductance

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4

The science of adapting electronics to aerospace flight.

A. Avionics

B. Aerotronics

C. Aerodynamics

D. Astrionics

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4

The core of a transformer heats up when its primary is fed from an ac source because of

A. permeability

B. ferromagnetism

C. reluctance of core

D. hysteresis loss

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4

The temperature coefficient of resistance of insulators is

A. zero

B. negative

C. positive

D. infinite

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4

What is the other name for dielectric strength?

A. Breakdown voltage

B. Electric intensity

C. Potential gradient

D. Dielectric constant

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4

Electric field intensity is a ________.

A. scalar

B. phasor

C. vector

D. variable

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If the resistance of a material 2 m long and 2 m^2 in area of cross-section is 1.6 ×10^-8 ?a then its resistivity is

A. 3.2 × 10^-8 ?-m

B. 1.6 × 10^-8 ?-m

C. 0.64 × 10^-8 ?-m

D. 0.16 × 10^-8 ?-m