Question # 1

Bernoulli's equation is based upon law of conversation of

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mass

momentum

Energy

None

______ plays the same role during angular motion as played by the mass in linear motion

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Torque

Angular Momentum

Moment of a force

Moment of inertia

The restoring force is ______ amd opposite to the applied force within _____:

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Equal, elastic limit

Different, the walls of the laboratory

Different, elastic limit

None of these

The application of Bernoulli's equation is

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Torricelli's theorem

Venture relation

Binomial theorem

Both a and b

An oscillating body oscillates due to:

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Applied force

Restoring force

Frictional force

None of these

In an A.C. circuit, a resistance of R ohm is connected in series with an inductance L. If phase angle between voltage and current be 45°. the value of inductive reactance will be

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R/4

R/2

R

Cannot be found with the given data

What will be the ratio of the distance moved by a freely falling body from rest in 4th and 5th seconds of journey?

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4 : 5

7 : 9

16 : 25

1 : 1

Origin of the electric and the gravitational forces

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Was known in 1911 A.D.

Was known in 1811 A.D.

Was known in 1711 A.D.

is still unknown

Was known in 1611 A.D.

A uniform resistance wire of Length L and diameter d has a resistance R. Another wire of same material has length, 4L and diameter 2d, the resistance will be

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2 R

R

R/2

R/4

Silicon is one of the mot commonly used:

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onductor

Dielectric

Insulator

Semiconduction

Both (B) and (C)

Hydrogen atom with only one proton and one neutron in its nucleus, and one electron, is called

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deuterium

protium

tritium

none of these

In a full wave rectifier, the diode conducts during

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Both halves of the input cycle

A portion of the positive half cycle of the input

Positive half cycle of the input

Both halves of the input cycle

The relation Cp > Cv by an amount equal to

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Gas constant

Universal gas constant

Both

None of these

The frame of reference in which Newton first law of motion holds is known as

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Inertial frame of reference

Non-Inertial frame of reference

Every frame of reference

None of these

A cold soft drink is kept on the balance.When the cap is opened then the weight

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Increases

Decreases

First increases then decreases

Remains same

Optically active substance are those substance which

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Produce polarization of polarized light

Rotate the plane of polarization of polarized light

Produce double refraction

Both a and b

Examples of polymers are

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Polythene

Polystyrene

Nylon

All of them

A body of mass 5 kg initially at rest is moved by a force of 2 N on smooth horizontal surface.The work done by the force in 10 s is

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20 j

30 j

40 j

60 j

An electric force which hold the charges to make atoms and molecules

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Positive charges

Negative charges

Neutral charges

a & b

Which one is the case when the wavelength is actually changed?

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When source move relative to observer

When observer move relative to source

When observer moves around a stationary source at the center of circle

When the relative displacement between source and observer is zero

In which situation does diffraction occur?

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a wave bounces back from a surface

a wave meets another wave to produce a new wave

a wave passes from one medium into another

a wave passes through an aperture

The torque is taken as negative when it is

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Clockwise

Anticlockwise

Both

None of these

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