Question # 1

The CRO deflects the beam of electrons, when they passes through uniform

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electric field

gravitational field

magnetic flax

magnetic field

Structure of the nucleus was explained by

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J.J Thomson

Bohr

Millikan

Rutherford

Which of the following represents an electric current?

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C^-1

CS^-1

J.S^-1

dynes^-1

A coil of constant area is placed in a constant magnetic field. An induced current is produced in the coil when:

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The coil is distorted

The coil is rotated

The coil is neither distorted nor rotated

Both A and B

None of these

The time taken to complete one vibration is called:

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Frequency

Amplitude

Time

Time period

The highest value reached by the voltage or current:

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In quarter cycle is called Instantaneous value

In half cycle is called peak-to-peak value

In one cycle is called peak value

In half cycle is called Instantaneous value

None of these

The He-Ne laser discharge tube is filled with:

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85% He

15% He

50% He

60% He

85% Ne

When a source of light isat very large distance,the shape of wavefront is:

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Spherical

Cylindrical

Plane

None of these

The mass of the object is a quantities measure of its

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speed

velocity

acceleration

inertia

The induced current in a conductor depends upon

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Resistance of the loop

Speed with which the conductor moves

Any of these

Both A and B

None of these

If the values of instantaneous and average velocities are equal, the body is said to be moving with

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uniform acceleration

uniform speed

variable velocity

uniform velocity

If a dielectric is placed between the plates of a capacitor its capacitance will

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Increase

Decrease

Becomes double

None of these

The dimensions of pressure are

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[ML²T^-2]

[ML-1T-2]

[M²LT^-1]

[M²LT^-2]

The rotational analogue of power is given by

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τω

τv

F ω

τ/ω

The two thin tubes which show most correctly the behavior of water are

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1 and 2

2 and 3

3 and 4

4 and 5

Breaking load for units area of cross-section of a wire is called:

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Tensile strength

Ductibility

Yield point

Breaking stress

The shape of crystals other than a cube have

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Right angles

Not right angles

Not corners

None of these

Is Boyle's law is applicable, to the isothermal process

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No

Yes

Some what applicable

None of these

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Initial velocity

Variable velocity

Instantaneous velocity

None of these

Due to emission of 𝖰+ − 𝒓𝒂𝒚𝒔:

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Mass of the nucleus increases

Mass of the nucleus decreases

Charge on the nucleus increases

Charge number decreases

With the increase of temperature viscosity

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Increase

Decrease

Remains same

Doubles

A non-uniform beam of weight 50 N is 2 m long and is supported on a pivot situated in the exact middle of the beam. The centre of gravity of the beam is 0.5 m ot the right of the point where the pivot touches the beam. What weight has to be added to the left side of the beam so that the beam stays perfectly balanced (in equilibrium)?

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25 N

12.5 N

50 N

Not enough information to answer the question

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