Question # 1

The Nobel Prize on the explanation of photoelectric effect was awarded to:

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Max. Planck

Maxwell

Bohr

Rutherford

None of these

Physical quantities are often divided into ______ categories

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3

2

9

5

If the distance between two charges is doubled, the force between them will become:

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Double

Half

Three times

One fourth

One third

The resistance of 20 cm long wire is 10Ω. When the length is changed to 40 cm. The new resistance is

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10Ω

20Ω

30Ω

40Ω

A relationship between Gauses of magnetic induction and Tesla(T) is given by

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G 10^-3T

G = 10^-2T

G = 10^-4T

G = 10^-1T

Which of the following is not an assumption of kinetic energy

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a finite volume of gas consists of very large number of molecules

the gas molecules are in random motion

collision between the gas molecules are inelastic

the size of the gas molecules is much smaller than the separation between molecules

Hertz is unit of:

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Time period

Displacement

Amplitude

Frequency

The equation of continuity is

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A₁A_{2 = V}₁V₂

A_1/_V_{1 =}A_2/V₂

_V_1/A₁₌V_2/A₂

A₁_V_{1 =}A₂V₂

If water in a closed bottle is taken up to the moon and opened, the water gets

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Freeze

Boiled

Dissociated into O₂and H₂

Evaporated

The body passing a viscous medium affected by:

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One force only

Two forces only

Four forces

None of these

In an A.C circuit with resistor only, the current and voltage have a phase angle of

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90°

0°

180°

none of these

The relative permitivity ∈_r for Paraffined paper is

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1.9

2.0

2.2

2.9

The doped semi-conductors materials are known as

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intrinsic semi-conductor

extrinsic semi-conductor

either of them

none of them

Critical angle of light passing from glass to air is minimum for

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Red

Green

Yellow

Violet

Work is defined as the dot product force and displacement which is a

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Scalar quantity

Vector quantity

Constant quantity

None of these

Inspite vibrations the force which hold the atoms in their ordered form is

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Vander vall force

Cohesive force

Adhesive force

None of these

Lead, copper and wrought iron are examples of

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brittle substances

ductile substances

plastic substances

elastic substances

When m₂>> m₁and V_{2 = 0 then result of their velocities}

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V₂= 0 and V₁= V'₁

V'₁= -V₁and V'₂= 0

V₁= V₁and V₂= 0

None of these

The diodes works on

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A.C

D.C

both A and B

None of these

The different parts of spectrometer

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Collimator

Turn table

Telescope

All of these

Total mass when silver coins are added to box as 2.2 kg, 0.01001 Kg and 0.01002 Kg correct to appropriate precision

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2.3 Kg

2.2 Kg

2.43 Kg

2.67 Kg

Semiconductors, like Ge or Si at room temperature becomes a

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Semiconductor

Conductor

Insulator

None of these

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