Question # 1

When current in an inductor is increasing

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energy is lost

Energy is being stored in the magnetic field of the inductor

Energy is being drained from the magnetic field of the inductor

Eddy current is produced

What is the degree of magnetization of a material.

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Susceptibility

Ablitity

Retentivity

Capacity

It is deduced that a piece of metal is already a magnet if

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A copper wire is attracted to it

A copper wire is repelled by it

One end of a compass is repelled by it

Both ends of a compass needle are attracted to it.

An immersion heater rated at 150 W is fitted into a large block of ice at 0 oC. The specific latent heat of fusionism 300 J g-1. How long does it take to melt 10 g of ice.

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5 s

10 s

15 s

20 s

The particles equal in mass or greater than protons are called.

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Mesons

Bosons

Baryons

Nucleons

The quality of a note

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Decreases with loudness

Varies directly as its pitch

Varies inversely as its pitch

Depends upon the overtones

What is the basic advantage of class A operation of an amplifier.

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It has high efficiency

It has high gain

It has low distortion

It has high distortion

The most convenient unit for energy at the atomic level is.

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Joule

Watt second

Newton metre

Electron volt

If a di electric is placed between the plates of a capacitor, its capacitance.

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Decreases

Increases

Remains unaffected

Is zero

What is shapes of a pure note

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Sinwave

Sawtooth

Square wave

Triangular wave

Which of the following is not the SI unit of magnetic flux density.

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Wb m2

N A-1 m-1

Tesla

N mA-1

The dimensional formula for torque is identical to.

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Kinetic energy

Pressure energy

Moment of force

All of the above

A resistor whose resistance decreases with increasing intensity is.

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Light dependent resistor

Thermistor

Thermocouple

Strain gauge

The mechanical equivalent of heat is.

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Physical quantity

Constant

Conversion factor

Zero

In a n-type material there is an excess of.

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Free electrons

Holes

Quarks

Measons

Amorphous solids are also called

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Crystalline solids

Glassy solide

super conductors

Polymeric solids

In case of a convex lens, image formed at 2 F is

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Virtual, erect and larger than the object

Real, inverted and large than the object

Real, inverted and same size as the object

Real, inverted and smaller than the object

A person suffering from short sighted ness uses

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Concave lens

Convex mirror

Convex lens

Concave mirror

An induced emf in a coil is independent of

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Time

Resistance

the number of turns in a coil

The charge in the magnetic flux

In Compton's effect the change in wavelength of a scattered photon is called.

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Angle of emergence

Angle of refraction

Angle of deviation

Compton shift

The emission of Beta particle from protonium -218 results in the formation of.

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Protactinium -231

Thorium -232

Astatine -218

Radon -222

If the image is virtual then its distance from the lens is taken.

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Positive

Negative

Double

Half

How much would be the volume of ice formed by freezing 1 litre of water.

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1.0 litre

1.09 litre

1.90 litre

2.0 litre

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

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Zero

Unity

-1

Infinity

Difference between the molar heat capacity constant pressure and that a constant volume is equal to

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Root mean square velocity

Mean free path

Boltzmann's constant

Universal gas constant

Which of the following has maximum viscosity.

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Oxygen

Mercury

Water

Glycerine

A double convex an bubble in water will behave as.

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Plane slab

Concave mirror

Convex lens

Concave lens

What should be the shape of an ideal thermometer.

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Sphereical

Cubical

Cylindrical

Rectangular

An alternation produced in shape length or volume when a body is subjected to some external force is.

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Deformation

Polymerization

Crystallization

Elasticity

What is the energy equivalent to amu in Me V

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0.931 MeV

9.31 MeV

93.1 MeV

931 MeV

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

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