Question # 1

Temperature of a system remains constant in

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Adiabatic process

Isobaric process

Isothermal process

Isochoric process

The phenomenon of total internal reflection occurs in

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Optical fibre

Rainbow

Mirage

All of these

Why hydrogen atom does not emit x-rays.

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its size is very small

It contains only single electron

In it energy levels are for apart

In it energy levels are close to each other

X-rays can cause

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Malaria

Dysentery

Cancer

Blood pressure

The cathode ray oscilloscope is used

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For viewing the wave shape of rapidly changing electric current

As voltmeter

For measuring time intervals between electricalimpulses

All of the above

An object gain excess negative charge after being rubbed against another object which is.

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Neutral

Negatively charged

Positively charged

either a, b, or c

When light emitting diode is forward biased, it emits light of the colour

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Red

Yellow

Green

All of these

Which of the following are examples of transverse and a longitudinal wave.

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Radio and sound waves

Radio and light waves

Light and water ripples

Light and sound waves

Which gas strictly obeys gas laws.

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Hydrogen gas

Inert gas

Ideal perfect gas

Helium gas

A tin film of liquid is enclosed between two glass plates it is difficult to spates the plates on account of.

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Surface tension

Atmospheric pressure

Viscosity

Friction

Which type of image is formed by a concave lens on a screen.

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Inverted and real

Inverted and virtual

Upright and real

Upright and virtual

What is measured by the energy dissipated when a source drives a unit charge round a complete circuit.

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Electromotive force

Potential difference

Power

Resistance

When a following field is governed by Maxwell's equations.

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Electrodynamics

Optics

electric circuits

All of these

The moment of inertia of a body comes in action in

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Circular motion

Straight line motion

Curved path

zig zag motion

The resistance of a wire does not depend upon.

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Area of cross section of the wire

Length of the wire

Temperature of the wire

Current passing though the wire

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

who gave the law of equipartition.

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Maxwell

Carnot

Claussius

Boltzmann

A cup of coffee at 80 ^oC is left to cool to 30 oc if the heat capacity of the cup and coffee is 2.0 kJ k-1 how much heat is released during the cooling.

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0.04 kJ

100 KJ

60 kJ

160 kJ

Artificial polymers are made by a chemical reaction known as.

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Crystallization

Electroplating

Polymerization

Polarization

An A.C. dynamo operates on the principle of

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Mutual induction

Self induction

Electromagnetic induction

Mechanical induction

linear magnification is the ratio between the

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Distances of object and image from mirror

Distances of object and image from the focal point

Distance of image and object from the mirror

Distance of image from object and the distance of object from mirror

What is the refractive power of cornea in humans.

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13 dioptres

23 diaoptres

33 dioptres

43 dioptres

A person suffering from short sighted ness uses

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Concave lens

Convex mirror

Convex lens

Concave mirror

Emitter follower amplifier is an example of.

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Current series feedback

Voltage series feedback

Current shunt feed back

Voltage shunt feedback

In the case of forced oscillations frequency of oscillation is.

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The natural damped frequency

The natural undamped frequency

The frequency of the external periodic force

Some other frequency

A germanium atom is

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Monovalent

Diavalent

Travalent

Tetravalent

Convention is the transfer of thermal energy by means of currents in

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Pressure

Temperature

Liquids

Fluids

At which temperature surface tension of liquid will be maximum

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0 ^oC

20 ^oC

30 ^oC

100 ^oC

How positives feedback will effect an amplifier.

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Increases the voltage gain

Decreases the voltage gain

Imitates oscillation to occur

Damaged it

Linear magnification is equal to the ratio of.

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Size of the object to the size of the image

Size of the image to the size of the object

size of the object focal length

Size of the image focal length

Induced fission result from the absorption of

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electron

Proton

Nucleon

Neutron

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