Question # 1

The electric intensity at infinite distance from the point charge will be

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Infinite

Positive

Zero

Negative

The value for systolic blood pressure for a normal healthy person is

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140 torr

80 torr

90 torr

120 torr

Lorentz force is defined as

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q(E + V x B)

q(E x B + V)

q(E x V + B)

q(E x B)

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

If two bodies of equal masses moving in the same direction collide elastically, then their velocities.

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Are added

Are subtracted

Do not change

Are exchanged

Frequency of red color as compared to that of violet color is:

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Equal

Smaller

Greater

None of these

To and from motion of a body about its mean position is known as:

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Translatory motion

Vibratory motion

Rotatory motion

None of these

If denotes the total number of molecules in cubic vessel such that m is mass of each milecule and I is length of each side of vessel, then mN/I³gives the:

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Force

Density

Work done

Pressure

A semi-conductor in its extremely pure form is known as

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extrinsic semi-conductor

intrinsic semi-conductor

either of them

none of them

At higher frequency of the alternating current, the capacitive reactance X_c

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Increases

Decreases

Remains the same

Increases only when the voltage increases

A current carrying conductor is placed at right angle to the magnetic field. The magnetic force experienced by the conductor is

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minimum

maximum

zero

none of these

Brittle is the property of the substance in which a material undergoes

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Elastic deformation

Plastic deformation

Ultimate tensile strength limit

None of these

If the error in the measurement radius of a sphere is 1% then the error in the measurement of volume will be

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8%

5%

3%

1%

Given that grating element = 0.2 x 10^-3cm in case of a diffraction grating. Then number of lines per centimeter will be

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500000

5000

50

5

In petrol engine, the third stroke is the

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Intake

Power

Exhaust

None of these

Coin of radius R is beaten uniform to make a disc of radius 2R.Its moment of inertia.

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Decreases

Increases

Remains the same

Decreases or increases depending on the actual value

In Bragg's formula, the path difference should beam integral multiple of the wavelengths

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d sin θ = nλ

d sin 2θ = nλ

2 d sin θ = nλ

None of these

The relation for impulse can be written as

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F x t = mV_i- mV_f

F x t = mV

F x t = mV_f- mV_i

None of these

Which will be more effective in knocking a bear down

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A rubber bullet

Lead bullet of same momentum

A wood bullet

None of these

Which of the following is a scalar quantity?

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Displacement

Electric field

Acceleration

Work

An optical fibre with its protective case may be typically 6.0 mm in diameter and yet it can replace bundle of copper of diameter

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6.79 cm

6.95 cm

7.52 cm

7.62 cm

Two wires of same material have lengths L and 2L and cross-sectional area 4A and A respectively. the ratio of their specific resistance would be:

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1: 1

1: 8

8: 1

1: 2

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