Question # 1

The solids are classified as

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Polymeric

Amorphous

Crystalline

All of above

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

The output voltage of a rectifier is.

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Smooth

Pulsating

Alternating

Per featly direct

Radioactivity happen due to the disintegration of

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Nucleus

Mass

Electrons

Protons

Both Xenon and cesium have

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33 isotopes

34 Isotopes

36 Isotopes

35 Isotopes

Half life of radon gas is

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3.8 minutes

3.8 days

3.8 months

3.8 years

The input resistance of an op amplifier is.

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Low

High

Zero

Equal to output resistance

The only difference between the construction of D.C and A.C is.

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Carbon burshes

Coil

Commutator

Magnetic field

The SI unit of magnetic permeability is.

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WbA-1m-1

Wbm-2

WbmA-1

WbAm-1

Magnetic effect of current is used in.

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Toaster

Electric iron

Electric motor

D.C. Battery

A device that shows the visible path of ionizing particle is called.

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GM counter

Solid state detector

Scalar

Wilson cloud chamber

The value of Stefan is constant is:

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4.57 x 10^-8 m²k²

5.67 x10^-8 wm^-2k^-4

6.67x 10^-11 wm²k⁴

7.45 x 10^-9 m² wk³

The electric potential at a mid point in an electric dipole is.

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0 V

0.5 V

1 V

1.5 V

The principle regarding the dual nature of light was first discovered by

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Compton

J.J.Thomson

De-Broglie

Heisenberg

Thermosouple is an arrangement of two different metals:

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Two convert heat energy into electrical energy

To produce more heat

To convert heat energy into chemical energy

To convert electrical energy into heat energy

The background radiation to which we are exposed, on the average is.

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1 mSv per year

2 mSv per year

3 mSv per year

4 mSv per year

The gain of transistor amplifier depends upon

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Resistance connected with collector

Resistance connected with base voltage

Input voltage

Output voltage

Unit of Stephen's constant is

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W m K^-2

W m^-2 K^-4

W m K^-4

None

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