Question # 1

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 characteristic of a body executing S.H.M is that its acceleration is

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inversely proportional to displacement

directly proportional to displacement

independent of displacement

equal to zero

Hold the solenoid in the right hand with fingers curling in the direction of current. The direction of the field will be given by:

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Thumb

Curled fingers

Middle finger

Arm of right hand

None of these

The special theory of relativity is based on:

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Four postulates

Three postulates

Two postulates

One postulate

None of these

The dimensions of work

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[MLT^-1]

[MLT^-2]

[ML²T^-2]

[MLT]

When two protons are brought closer potential energy of both of them:

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Increases

Decreases

Remains same

None of these

One joule is equal to

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1.6 x 10¹⁹eV

6.25 x 10¹⁸eV

1.6 x 18¹⁸eV

6.25 x 10¹⁹eV

Work is a:

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Scalar quantity

Vector quantity

Base quantity

None of these

Rate of diffusion is

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Faster in solids than in liquids and gases

Faster in liquids than in solids and gases

Equal to solids, liquids and gases

Faster in gases than in liquids and solids

Coulomb force, when any material medium is placed between two charges

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Increases

Decreases

Remain unchanged

None of these

In RLC series circuit, resonance occurs when

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X_{L > Xc}

X_{L < Xc}

X_{L = Xc}

None of these

Nicrom wire is an example of

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Non ohmic device

Ohmic device

Neutral device

Charged device

When the both conditions are satisfied, then there is no

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Linear acceleration

Angular acceleration

Linear acceleration and angular acceleration

None of these

If the distance of separation between two chares is increased,the electrical potential energy of the system will

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Increase

Decrease

May increase or decrease

Remain the same

The two vectors to be combined have magnitude 60 N and 35 N. Pick the correct answer from those given below and tell why is it the only one of the three that is correct.

(i) 100 N

(ii) 70 N

(iii) 20 N

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(i) is correct

(ii) 20 N

(iii) is correct

(ii) may be correct

The cores of electromagnets used for alternating currents where the specimen repeatedly undergoes magnetization and demagnetization should have

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broad hysteresis curves

narrow hysteresis curves

any one of the them

none of them

An automobile moves with constant speed along a circle of radius 40 m. It takes 2 μ second to complete one circle,The average speed for one complete circle is

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20 ms^-1

40 ms^-1

60 ms^-1

0 ms^-1

1 torr = ______

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1.20 Nm^-2

1.38 Nm^-2

1.33 Nm^-2

1.31 Nm^-2

The escape velocity of mercury in Kms^-1

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1.29

3.24

4.02

4.3

We are living in the age of

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Technology

Information technology

Space age

None of these

The dielectric constant K of an insulator can be

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-1

Zero

0.5

5

To observe diffraction phenomenon the size of a obstacle

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Should be much larger than the wavelength

Should be of the same order as the wavelength

Have no relation of wavelength

Should be exactly λ/2

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