Question # 1

The size of the domain is such that they can contain

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10²to 10⁴atoms

10⁴ to 10⁸atoms

10⁸to 10¹²atoms

10¹²to 10¹⁶atoms

If the velocity time graph is a straight line parallel to time-axis, then it means that:

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The body is moving with uniform velocity

The body is moving with uniform acceleration

The body is at rest

None of above

A current of 1.6 A is passed through a solution of CuSO_{4. How many Cu}²⁺ions are liberated in one minute?

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3 x 10²⁰

3 x 10¹⁰

6 x 10²⁰

6 x 10¹⁰

Method "lamp and scale arrangement" used to measure the

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angle of deflection

restoring torque

magnetic field strength

current

If 42 J heat is transferred to the system and the work done by the system is 32 J then what will be the change in internal energy

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0 J

2 J

5 J

10 J

The reverse saturation current in a PN junction diode is only due to

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Majority carriers

Minority Carriers

Acceptor ions

Donor ions

The SI units of momentum is

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kg m s^-2

kg ms

kg m s²

N-s

Bernoulli's equation is applicable for

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turbulent flow

streamline flow

both (a) and (b)

all kinds of flows

Work is always done on a body when:

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A force acts on it

It moves through certain distance

None of A and B is correct

Both A and B is correct

The value of the plank's constant 'h' is given by

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1.6 x 10^-19J

1.67 x 10^-27Kg

6.63 x 10³⁴Js

6.63 x 10^-34Js

A body moves a distance of 10 m along a straight line under the action of a force of 5 N. If the work done is 25 J, the angle which force makes with the direction of motion of a body is:

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0°

30°

60°

90°

Viscosity of air at 30^oC in Nsm^-2

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0.015 × 10^-3

0.019 × 10^-3

0.151 × 10^-3

0.0179 × 10^-3

The mass of the object is a quantitative measure of

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Motion

Momentum

Inertia

None of these

Ratio between total intensity of magnetic field at equator to poles is

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1 : 1

2 : 1

1 : 2

1 : 4

Physics is an important and basic part of physical sciences which is a

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Mathematical science

Experimental science

Statistical science

None of these

For an elliptic orbit, the satellite has speed of

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30,0000 kmh^-1

35,000 kmh^-1

37,000 kmh^-1

None of these

The approximate efficiency of dry cell battery is

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80%

90%

70%

50%

The dimensions of ½at²are of

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length

Velocity

Acceleration

TIme

The stress which increase the length in one dimension only is called

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length stress

only have compressive stress

Have both tensile and compression stress

None of them

The results of mechanical tests are usually expressed in terms of:

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Stress

Applied force

Strain

Deformation

All of these

If the body undergoes unequal displacements in equal intervals of time, the body moves with

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variable velocity

constant velocity

uniform velocity

zero velocity

The period of a satellite when there is critical velocity is

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80 min approx

84 min approx

82 min approx

90 mix approx

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