Question # 1

Special organs called ampullae of lorenzenite are present in.

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Bats

Cats

Dogs

Sharks

For accurate measurement of current through a circuit, the resistance of ammeter should be

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Very small

Very high

Neither small nor high

None of the above

In carbon resistors, then value of Blue colour is.

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6

7

8

9

In Helium Neon laser, discharge tube is filled with Neon gas.

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10%

15%

85%

90%

Compton's effect is associated with

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gamma rays

Beta rays

X rays

Positive rays

How many neutrons are there in the nuclide Zn⁶⁶?

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22

30

36

66

The energy of photon is givne by

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mv2/2

hf

Va e

mac¹

Electric intensity due to an infinite sheet of charge is:

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∂/2ε_∘

∂/rε_∘

∂/r2ε_∘

none of these

A.C is converted into D.C by

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Dynamo

Rectifier

Motor

Transformer

During each cycle A.C. voltage reaches a peak value.

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Once

Twice

Thrice

Four time

When a charge is projected perpendicular to a uniform magnetic field, tis path is

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Spiral

Helix

Ellipse

Circular

In extrinsic semiconductors doping is of the order of.

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1 atom to 10⁴

1 atom to 10⁶

1 atom to 10⁸

1 atom to 10³

At resonance frequency, the impedance of RLC series circuit is.

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Maximum

Minimum

Zero

Infinite

A proton consists of quarks which are.

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Two up, one down

One up, two down

All up

All down

Energy stored per uint volume inside a solenoid is called as

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energy density

Electric flux

Work

Volume charge density

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

A charge on 4 coulomb is in the field of intensity 4N/C the force on the charge is.

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Uniform

Non uniform

Weak

Strong

The converses of annihilation of matter is:

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Photoelectric effect

Relativistic effect

Pair production

Compton effect

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