Question # 1

There is regular arrangement of molecules in:

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Amorphous solids

Crystalline solids

Both a and b

None of above

The symbol of p-n-p transistor is

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If we make magnetic field stronger the value of induced current is.

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Decreased

Increased

Vanishes

Remain constant

Which of the following is typical source of alpha particle.

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Strontium -94

Radon -222

Cobalt -60

Zic sulphate

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

Drum of photocopier is made of.

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Copper

Aluminum

Nickel

Cobalt

The field is strong and uniform.

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Inside the solenoid

Surrounding of solenoid externally

Perpendicular to solenoid

All of above

Terminal potential difference is greater than emf of the cell when

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Circuit is open

Circuit is closed

small battery is charged by bigger battery

None of these

The electrical intensity is equal to:

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-Δr/Δv

Δv/Δr

Δv/Δv

-Δv/Δr

The main reason for world wide use of A.C is because:

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It is very high power

It can be transmitted over long distance

It is cheaper to use

ALl of above

At high frequency, the current through a capacitor is

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Small

Infinity

Zero

Large

The use of LDR is in the circuit of.

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Logic gate

Rectifier

Oscillator

High Switch

Seven resistances are connected as shown in the figures . THe equivalent resistance between A and B is:

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3Ω

4Ω

4.5Ω

5Ω

Concept of the electric field lines is introduced by

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Coulomb

Faraday

Einstein

Joseph henry

Which one of the following bulbs has the least resistance.

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100 W

200 W

500 W

1000 W

Laser is a beam of light which is

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Monochromatic

Coherent

Unidirectional

All of these

When gama rays are emitted, the nuclear mass.

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Decreases by 4 units

Does not change

Increases by 2 units

Increase by 1 unit

1 rad =

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0.001Gy

0.01Gy

0.1Gy

1.01Gy

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