Question # 1

Force per unit charge is called:

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Gravitational force

Electric field intensity

Coulomb's force

None of these

Electric field intensity at a point is defined by the relation.

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E= q/F

E = F/q

E = qF

E = F/q2

Sensitivity of a galvanometer can be increased by

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Decreasing the value of torsional couple

Decreasing number of turns

Decreasing area of plane of coil

Decreasing magnetic field

Vrms =

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0.7V_∘

0.07V_∘

0.007V_∘

0.75V_∘

In the equation if f₂ > then

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A proton is about 1840 time than an electron. When it is accelerated by a potencial difference if 1 kV, its kinetic energy will be:

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1884 ke V

1/1840 keV

1 keV

920 keV

Curie temperature is a point where :

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Diamagnetism changes to paramagnetism

Paramagnetism changes to Diamagnetism

Ferromagnetism changes to paramagnetism

Paramagnetism changes to Ferromagnetism

Which of the modulus of elasticity is involved in compressing a rod to decrease its length ?

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Young's modulus

Bulk modulus

Modulus of elasticity

None of these

In a coil current change from 2 to 4 A in .05 s . If the average induced emf is 8 V then coefficient of self-inductance is:

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0.2 henry

0.1 henry

0.8 henry

0.04 henry

Improper bisting of a transistor circiut produces:

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Heavy loading of emitter current

Distortion in the output output signal

Excessive heat at collector terminal

Faculty location of load line

The position has charge which is in magnitude equal to the charge on

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Electron

Proton

β particle

All

The vector sum of electric force and magnetic force is called:

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Deflecting force

Lorentz force

Newton force

Faraday's force

Electro magnetic waves emitted from radio antenna are.

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Stationary

Longitudinal

Transvers

Both a and b

Intensity of field inside a hollow charged sphere will be.

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Negative

Unaffected

Zero

Maximum

The electromagnetic spectrum contains

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Radio waves

X-rays

Microwaves

All of these

Mutual induction play role in.

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Generator

D.C. motor

Galvanometer

Transformer

If 10 A current passes through 100 mH inductor, then energy stored is.

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100 J

5 J

20 J

Zero

The jerks in D.C. motor are created by the use of.

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Armature

Commutators

Split rings

Source of emf

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