Question # 1

When a nucleus emits alpha particle its atomic mass decreases by

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1

2

3

4

Marie Curie and Pierre Curie discovered.

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Uranium

Uranium and Radium

Polonium and radium

Radium

Electric potencial of earth is taken to be zero because the earth is good:

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Semiconductor

Conductor

Insulator

Dielectric

The word amorphous means:

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Regular structured

Without form or structure

Frozen structured

None of above

If the frequency of A.C. supplied is doubled then the capacitive reactance becomes.

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Half

Two

Four times

One fourth

In pure capacitor A.C. circuit, the current I and charge q are.

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In phase

Out of phase

Parallel to each other

None of above

The ratio of applies stress to volumetric strain is called:

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Young modulus

Shear modulus

Bulk modulus

Tensile modulus

The domain theory of magnet is important to explain the behaviour of

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Diamagnets

Paramagnets

Ferromagnets

All of these

The value of Wien's constant:

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2.9x10^-3mk

2.19x10^-7mk

3.18 x10⁶ km^-1

6.21 x 10^-9m²wk³

For electromagnetic waves, Maxwell generalized

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Gauses law for magnetism

Gauses law for eletricity

Fradays law

Amperes law

Vrms =

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0.7V_∘

0.07V_∘

0.007V_∘

0.75V_∘

Electro magnetic waves emitted from radio antenna are.

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Stationary

Longitudinal

Transvers

Both a and b

The quantity of U in the naturally occurring uranium is.

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0.2%

0.3%

0.7%

0.4%

The unit of Rh is.

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ms-1

m

m²

m^-1

The mutual inductance between two coils depends upon their

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Size

Core material

Size, core material and separation

Separation

The peak value of A.C source is 20 A, then its rms value will be.

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14.1 A

10 A

20 A

28.2 A

The use of LDR is in the circuit of.

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Logic gate

Rectifier

Oscillator

High Switch

Which one of the following bulbs has the least resistance.

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100 W

200 W

500 W

1000 W

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