Question # 1

The solid with definite M.L are called:

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Crystalline

Amorphous

Polymeric

None of above

When a PN-Junction is reverse biased the depletion region is.

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Widened

Narrowed

Normal

None of these

Radio frequency choke is

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Iron cored

Air Cored

Air as well as iron cored

None of these

If both the magnitude of charges and distance between them is doubled, then coulomb's force will be.

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Doubled

Hlaf

Remain same

One fourth

The resistivity of two wires isρ₁ andρ₂ which are connected in series. If there dimentions are same then the equivalent resistivity of the combination will be:

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(ρ₁ +ρ₂)

1/ρ₁+ 1/ρ₂

ρ₁+ρ₂/2

ρ_1/ρ₂

Lorentz force means the force acting on a particle, which is

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Magnetic force only

Electric force only

Sum of electric and magnetic force

None of these

Which pair belongs to hadrons.

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Protons and Neutrons

Neutrons and electrons

Photons and electrons

positrons and electrons

In 1905, the special theory of relativity was proposed by

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Einstein

Bohr

Maxwell

De Broglie

The following gas was identified in the sun using spectroscopy

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Hydrogen

Helium

Carbon

Nitrogen

The unit of resistance is:

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Ω

Ωm

Ω^-1m^-1

Ωm^-1

In Wilson cloud chamber, ß-particles leave

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Thin and continuous tracks

Thick and continuous tracks

No tracks

Thin and discontinuous tracks

In a transistor, collector current is controlled by:

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Collector voltage

Base current

Collector resistance

All of the above

Intensity of field inside a hollow charged sphere will be.

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Negative

Unaffected

Zero

Maximum

A 50 mH coil carries a current of 2.0 a , then energy stored in tis magnetic field is.

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0.1 J

10 J

100 J

1000 J

The power factor of RL series circuit is.

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0

1

Less then 1

More than one

The colour of light emitted by a LED depends on.

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It forward biased

Its reverse biased

Unbiased

None of these

The types of quacks are.

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2

3

4

6

Mass of meason is

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Greater then proton

Less than proton

Equal to proton

Equal to neutron

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