Question # 1

One weber is equal to.

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N A-1

N m-1 A

N mA-1

N m-1 A-1

Which of the following is used for the failure of a lens to form a sharp and distinct image.

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Distortion

Astrigmation

Chromatic aberration

spherical aberration

Which given element has lowest work function

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Na

Al

si

C

Which of the following is the ability to hold an electric charge in electromagnetism.

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Resistance

Impedance

Inductance

Capacitance

Light entering glass will not suffer change in

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Frequency

wavelength

Speed

Direction

Direct current generators use.

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Coiled rings

Split rings

slip rings

solenoid rings

Two sources of sound are said to be in resonance when.

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They look like similar

They produce sound of same frequency

They are enacted by the same agent

They differ from each other

The cause of ferromagnetism is.

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Orbital motion of elections

spin Motion of electrons

Permanent dipole memento

Spin angular momentum

The magnetic field inside a solenoid is

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Zero

Infinite

Uniform

Non uniform

What would be the magnitude and direction of acceleration which would made the spring balance reading zero.

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Zero

1 m s-2 upward

9.8 m s-2 upward

9.8 m s-2 downward

The field inside a hollow spherical conductor is.

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Constantin zero

Constant but not necessarily zero

A function of charge on sphere

a function of distance from the centre

In case of a convex lens when object is placed away from 2F, image is formed.

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at F

at 2F

away from 2 F

Between F and 2 F

Which effect produce ultrasonic is quartz.

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Pyroelectric effect

Piezoelectric effect

Hall effect

Magnetostriction effect

Polarization is characteristic of.

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Light wave

sound waves

Waver waves

x-rays

A constant mass undergoes uniform acceleration the correct statement about the resultant force acting on the mass is.

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It increases uniformly w.r.t time

It is constant but not zero

It is proportional to the displacement from a fixed point

It is proportional to the verlocity

A pendulum vibrates with a time period of 1 s which range of sound is produced by it

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Audible

Infrasonic

Ultrasonci

Super sonic

The electron behave an waves because

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They can be diffracted by a crystal

They can produce ions in gases

They can be deflected by magnetic field

They can be deflected by electric field

A frictionless heat engine can be 100% efficient only if its exhaust temperature is

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Equal to the input temperature

Less than the input temperature

0 ^oC

0 K

A particle executing simple harmonic oscillations of frequency 100 Hz has an amplitude of 0.1 cm The velocity amplitude of the particleis.

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20 micro cm s-1

10 micro cm s-1

20 cm s-1

19 cm s-1

The wavelength is the distance along the line of wave propagation between two successive particles which have equal

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Velocities

Phases

Amplitude

Displacements

An inflated tyre suddenly bursts As a result of this temperature of the surrounding

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Increases

Descreases

Remains constant

May increase or decrease

The gravitational force between two bodies does not depends upon.

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The product of their masses

Their separation

The sum of their masses

The constant of gravitation

When an electron and a positron are annihilated, then number of protons produced is.

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1

2

3

4

What is the direction of the magnetic field lines inside a bar magnet.

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From north pole to south pole

From south pole to north pole

From side to side

There are no magnetic field lines

Which gas strictly obeys gas laws.

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Hydrogen gas

Inert gas

Ideal perfect gas

Helium gas

The pascal is not the SI derived unit of.

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Pressure

Stress

work

Tensile strength

The dimensions of strain are.

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[MLT-2]

[ML-1T-2]

[ML-2T-3]

It is a dimensionless quantity

Self inductances of solenoid is

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Directly proportional to the current flowing through the wire

Directly proportional to its length

Inversely proportional to area of corss section

Directly proportional to number of turns

The magnitude of the instantaneous velocity is called the.

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_Displacement

Speed

Acceleration

Length

The graph between restoring force and time in SHM is a

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Straight line

Parabola

Sine wave

Circle

A liquid surface tend to contract this phenomenon is due to

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Viscosity

Diffusion

Density

surface tension

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