Question # 1

Electric intensity at a place due to a charged conductor is a

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Scalar quantity

Vector quantity

Semi vector and semi scalar

Dimensionless quantity

Both A and D are true

The resistance of a conductor does not depend on its

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mass

resistivity

length

cross-sectional area

Work has the dimensions as that of

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Torque

Angular momentum

Linear momentum

Power

A current of 1 ampere is passing through a conductor. The charge passing through it in half a minute s

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One coulomb

0.5 coulomb

30 coulombs

2 coulombs

None of these

In an elevator moving vertically up with an acceleration 'g' the force exerted on the floor by a passenger of mass M is

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Mg

1/2 Mg

Zero

2 Mg

Bernoulli's equation is based upon law of conservation

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Mass

Momentum

Energy

None of these

Most of the geysers occur in:

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Volcanic regions

Magnetic regions

Northern region

None of these

Free oscillations are always produced by:

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An applied force

Gravitational force

Restoring force and inertia

Inertia only

If the amplitude of sound is doubled and the frequency reduced to one-fourth, the intensity of sound at the same point will be

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Increasing by a factor of 2

Decreasing by a factor of 2

Decreasing by a factor of 4

Unchanged

The time of flight of a projectile motion equal to

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half of the time to reach maximum height

twice the time to reach maximum height

one fourth of time to reach maximum height

time to reach maximum height

The information from far side of the universe are gathered by

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Radio telescope

Microscope

Telescope

Spectro scpe

What remains constant in the field of central force?

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Potential energy

Kinetic energy

Angular momentum

Linear momentum

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

The low blood pressure is

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70 - 80 torr

75 - 80 torr

78 - 809 torr

79 - 80 torr

When a bicycle is in motion the frictional forces exerted by the ground are:

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In the forward direction on both the wheels

In the backwards direction on both the wheels

In the forward direction on the front wheel and the backward direction on the rear wheel

In the backward direction on the front wheel and the forward direction on the rear wheel.

The number of significant figures in all the given number 25.12.2009,4.156 and 1.257 x 10^-4 is

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1

2

3

4

The field in which the work done be independent of the path followed is called

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Conservative fields

Non-conservative field

Varying intensity field

None of these

If a body is moving with uniform velocity, then it is said to be in

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torque

equilibrium

dynamic equilibrium

static equilibrium

The escape velocity of Uranus in Kms^-1

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22.4

23.07

24.09

24.5

In nuclear fission reaction, when the products are 140X and 94Sr, the number of neutrons emitted is

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1

2

5

9

On applying a stress of 20 x 10⁸Nm^-2, the length of perfectly elastic wire is doubled. Its young' modulus is

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40 x 10⁸N/m²

20 x 10⁸N/m²

10 x 10⁸N/m²

5 x 10⁸N/m²

If 5000 lines/cm are ruled on a diffraction grating, the element is:

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5 x 10^-5m

2 x 10^-6m

5 x 10^-6m

2 x 10^-5m

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