Question # 1

While finding the electric intensity at a point between two oppositely charged parallel plates, the Gaussian surface is taken in the form of a hollow:

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Cylinder

Box

Sphere

Circle

Rectangle

Wave length of light, on the average, is given by:

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10^-14_m

10^-10_m

10^-6_m

10^-4_m

When a suitable small resistance is put in parallel with the galvanometer coil, it is converted into

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Voltmeter

Avometer

Ammeter

None of these

An induced current can be produced by:

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Constant magnetic field

Changing magnetic field

Varying magnetic feild

Constant electric field

None of these

The emission of radiations take place in elements, having charge number greater than

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109

82

69

52

Work done is maximum when angle between force and displacement is:

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0°

90°

180°

None of these

INTELSAT operates at frequencies 4, 6, 11, 14 having unit of

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KHz

MHz

GHz

BHz

The pattern of NaCl particles have a shape which is :

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Cubic

Body centred cubic

Simple cubic

face centred

Both (A) and (C)

If the flow is incompressible and the flow is steady then the mass of the fluid through the pipe

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increases

decreases

becomes zero

is conserved

In photoelectric effect the energy of ejected electrons depend on

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The frequency

The intensity

Both frequency and intensity

None of these

When a shell explodes in mid-air, its fragments fly off in

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only one direction

in two direction

different directions

a particular direction

Spectrum of sun consists of

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Bright lines

Dark lines

Bright bands

Dark bands

With the rise of temperature the amplitude of atoms

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Slow down

Fixed

Increases

None of these

Light and heavy bodies have equal K.E, then which one has greater momentum

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The heavy body

The light body

Both

Cannot be said

The terminal velocity of a small size spherical body of radius R moving in a fluid varies as

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R

R²

1/R

(1/R)²

Diameter of the nucleus is of the order of

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10^-10m

10^-12m

10^-15m

10^-18m

Pressure may be defined as_____per second per unit area:

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Change in force

Change in momentum

Change in energy

Work done

In an optical fibre the speed of light is

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Directly proportional to its refractive

Inversely proportional to its refractive inedex

Independent of refractive index

Directly proportional to square of refractive index

The synchronous satellites are very useful for

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Worldwide communicatioin

Weather observations

Navigation

All of these

The rate of change of angular momentum is

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The applied force

The moment of inertia

The applied torque

Impulse

Ultra-violet rays differ from X-rays in that ultra - violet rays

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Cannot be diffracted

Cannot be polarized

Do not affect a photographic plate

Have a lower frequency

Electric current is defined as:

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Flow of charges through conductor

Rate of flow of charges through conductor

Flow of electrons

Flow of protons

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