Question # 1

Which quantity is not affected by a magnetic field.

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Moving charge

Stationary charge

Current flowing in a conductor

Charge in magnetic flux

A bus and a car moving with the same K.E. are acted upon by the same retarding force then the

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car will stop first

Bus will stop first

Both will stop simultaneously

Both will never stop

The amount of charge which can be placed on a conductor does not depend on.

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The dielectric strength of the surrounding medium.

Its capacitance

Its potential

Its size or shape

What is the degree of magnetization of a material.

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Susceptibility

Ablitity

Retentivity

Capacity

A transistor can be used as

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Oscillator

Amplifier

Switch

Both a and c

The power of convex lens of focal length 50 cm will be

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1,0 dioptre

2.0 dioptre

4.0 dioptre

5.0 dioptre

The dimensions of torque are.

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[MLT-2]

[ML-1T-1]

[ML2T-2]

[ML-2]

Why transistor is preferred to triode valve for use as an amplifier.

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Because it can handle large power

Because it has higher input impedance

Because it has higher voltage gain

Because it has lower voltage gain

Heat Carnot be transferred from a colder to a hotter region unless work is done This is the statement of.

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Firs law of thermodynamics

Second law of thermodynamics

Third law of thermodynamics

Zeroth law of thermodynamcis

The decay to form other nuclides by emitting particles and electromagnetic radiations by unstable nuclides is called.

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Nuclear stability

Radioactivity

Carbon dating

Spontaneously

A field in which the work done in moving a body along the closed path is zero.

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electric field

electromagnetic field

Conservative field

Non conservative field

Where is the velocity of electrons maximum in a diode.

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Near the cathode

Near the anode

In the space ini between the two elecrode.

It is same throughout the tube

What is the change in path when sound wave is reflected from a rigid support.

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Lamda /2

Lamda

2 lamda

Zero

The kinetic molecular model of matter describe matter an being made up of molecules in continuous.

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Vibratory motion

Random motion

rotatory motion

Linear motion

A bomb dropped from an aeroplane explodes in air, its total.

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Momentum decreases

Momentum increases

K.E. Increases

K.E. Decreases

When a perfect gas is supposed to expand freely in an isolated vessel the gas has undergone.

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An increase in pressure

An increase in temperature

A change in phase

A change in entropy

Planets move around the sun due to.

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Centrifugal force

Centripetal force

Gravitational pull between them

Frictional force between them

The resistance of 10 micro F capacitance, when connected to A D.C. circuit is.

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Zero

Unity

-1

Infinity

The speed of bodies exceeding the speed of sound is called.

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Superesonic

Ultrasonic

Infrasonic

Super fast

In CC configuration voltage gain is.

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Less than one

More than one

One

Zero

Which six particles and their antiparticles interact by the weak interaction.

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Leptons

Hadrons

Muons

pi mesons

The work done in moving a body from one place to another in a gravitational field is independent of the

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applied force

Force of gravity

Path followed by the body

Force of earth

Which of the following phenomenon is explained by the tunnel efffect.

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Alpha decay

Beta decay

Gama decay

Radioactivity

At which temperature a ferromagnetic material becomes paramagnetic on healing.

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Kelvin temperature

Celsius temperature

Curie temperature

Fahrenheit temperature

A charged particles moving in a magnetic field experiences a resultant force.

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Proportional to its K.E.

In the direction of the field

In the direction opposite to its motion

In the direction perpendicular to both the field and its motion

On loading the prong of a tuning fork with wax. Its frequency.

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Increases

Decreases

Remain unchanged

May increase or decrease

If there are no frictional effects, the mechanical energy of a system executing simple harmonic motion.

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Changes with time

Is variable

Is constant

Is not conserved

The amount of heat developed in a resistor is directly proportional to.

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The square of the current only

The resistance of the conductor only

The time of current passing only

The square of current resistance and teh time of current flow

Which of the given factors is increased in a step down transformer.

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Voltage

Current

Wattage

Resistance

Who developed the world's first vacuum pump in 1650.

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Otto vori Guricke

Lord Kelvin

Saadi Carnot

James maxwell

The process by which nuclei emit a ,b and gama rays in order to attain stability is called.

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Radioactive disintegration

Radio activity

B decay

Radioactive transmulation

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