Question # 1

The number of neutrons in Li are

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2

3

4

7

The gain of transistor amplifier depends upon

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Resistance connected with collector

Resistance connected with base voltage

Input voltage

Output voltage

In chopke coil the resistance X_L an resistance R are:

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X_L=R

X_L<<R

X_L>>R

X_L=∞

For normal use:

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Emitter base function is reversed biased

Collector base junction is reserved biased

Emitter base junction is forward biased

Both c and b

The bnding energy for nucleus A is 7.7 Me V and that for nucleus B is 7.8 MeV. Which nucleus has the larger mass?

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Nucleas A

Nucleus B

Less than nucleus

None of these

Some charge is being given to a conductor. Then its potencial

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Its maximum at surface

Its maximum at Its maximum at center

Is remain same throughout the conductor

Is maximum somewhere between surface and centre

unit of Plank's constant is same as that of.

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Acceleration

Angular momentum

Linear momentum

Entropy

Which one has greater cone of impurity among all:

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Emitter

Base

Collector

All are pure

Platinum wire becomes white at a temperature of.

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1600^oC

1300^oC

1100^oC

900^oC

The number of Neutron is²³⁸U₉₂is

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92

238

146

330

Photons emitted in inner shell transition are.

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Continuous X -rays

Discontinuous X rays

Characteristic X rays

Energetic X rays

A capacitor is charged with a battery and then it is disconnected. A slab of dielectric is now inserted between the plates, Then

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The charge in the plates reduces and potencial difference increase

Potencial difference between the plates increase, stored energy decreases and charge remains the same

Potencial difference between the plates decreases, stored energy decreases and charge remains unchanged

None of them

Antiparticle of electron is.

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proton

Photon

Positron

Neutron

The electric field created by positive charge is:

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Radially outward

Circular

Radially inward

Zero

Which of the following basic force is able to provide an attraction between two neutrons:

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Electrostatic and nuclear b

Electrostatic and gravitational

Gravitational and strong nuclear

Only nuclear force

For rectification we use.

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Transformer

Diode

Choke

Generator

Before and after nuclear reaction the number of protons and neutrons:

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Must be different

Must be decreased

Must be increased

Remains same

An ammeter is an electrical instrument which is used to measure.

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Voltage

Current

Resistance

None

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