Question # 1

The useful unit of angular replacement in SI unit is:

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Degree

Revolution

Radian

Metre

Within each domain, the magnetic field of all the spinning electrons are

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parallel

antiparallel

perpendicular

all of them

A body moves a distance of 10 m along a straight line under the action of a force of 5 N and work done in 25J. The angle which the force makes with the direction of motion will be

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60°

90°

30°

0°

The absolute temperature for an ideal gas is

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directly proportional to the rotational K.E of gas molecules

directly proportional to the vibrational K.E of gas molecules

directly proportional to the average translational K.E.of gas molecules

directly proportional to the P.E. of gas molecules

Which is modified form of galvanometer

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potentiometer

battery

voltmeter

slide wire bridge

The number of "Earth stations" which transmit signals to satellites and receive signals from them are:

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3

24

126

200

The inside cavity of the black body is

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painted white

painted silver

blackened with soot

painted red

During the whole carnot cycle

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Thermal equilibrium is maintained

mechanical equilibrium is maintained

both the thermal and mechanical equilibriumis maintained

both the thermal and mechanical equilibrium is not maintained

The minimum resistance that can be obtained by connecting 5 resistance of 1/4Ωeach is

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4/5Ω

5/4Ω

20Ω

0.05 Ω

Absolute motion cannot be detected

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in its own frame of references

in a different frame of references

both in its frame and different frame of references

none of these

The SI unit of strain is

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N

Dynes

Pascal

Dimensionless

The ratio of output work per cycle to input energy per cycle is called:

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Entropy

Internal energy

Efficiency

None of these

A 2 kg body and a 2 kg body have equal momentum. if the kinetic energy of 3 kg body is 10 j. The K.E of 2 kg body will be

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6.66 j

15 j

22.5 j

45 j

The scattering of X-rays from atoms in a crystalline lattice gives rise to

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Interference

Diffraction

Reflection

None of these

A stethoscope detects the instant at which the external pressure is

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Greater than systolic pressure

Equal to systolic pressure

Lower than systolic pressure

None of these

The young s modulus for a perfectly rigid body is

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Zero

1

Infinite

None of these

Surface tension of water is due to

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Inter molecular attractions

Intermolecular spaces

Inter molecular repulsion

None of above

Dimensions of velocity are

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[L]

[T]

[LT^-1]

[LT^-2]

As isolated system in which

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No internal force acts

No external force acts

No internal and no external force acts

None of these

The fibre core has constant refractive index such as

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1.48

1.5

1.52

1.56

Polymers are the physical combinations of carbon with:

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Oxygen only

Hydrogen

Nitrogen

All of these

None of these

If the instantaneous velocity of a body does not change, the body is said to be moving with

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average velocity

uniform velocity

instantaneous velocity

variable velocity

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