Question # 1

Work is always done on a body when:

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A force acts on it

It moves through certain distance

None of A or B is correct

Both A and B is correct

The direction of lines of force depends upon the direction of

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voltage

current

charges

none of these

The photocopying process is called:

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Geography

Sonography

Xerography

Zerography

None of these

Each atom in metal crystal:

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Remains fixed

Vibrates about a fixed point

Moves randomly

Rotates about center of a crystal

None of these

In a cubic crystal, All solids meet at:

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60^o

90^o

109^o

30^o

10^o

The sum of positive and negative peak values are usually written as

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P-P value

negative

zero

may be positive or negative

When the waveform of one voltage is increasing and that of second is decreasing and vice versa, then phase difference between these voltage is

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90°

75°

0°

180°

CRO deflects the beam of

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proton

a-particle

electron

neutron

A spring of constant k = 0.4 N m^-1is to be extended through 10 cm at a place where g = 10 m sec^-2. The mass to be suspended should be:

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4 gms

0.4 gm

40 gms

None of these

The net force acting on a 100 kg man standing in an elevator accelerating downward with a = 9.8 m sec^-2comes out to be

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980 N

580 N

1380 N

Zero

Tick the correct answer:

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Torque is a vector quantity

Torque is the turning effect of a force

Torque is called moment of a force

All of above

In Huygen's wave theory the locus of all points in the same state of vibration is called

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A half-period zone

Vibrator

Wave front

A ray

When seen in green light the saffron and green portions of our National Flag will appear to be

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Black

Black and green respectively

Green

Green and yellow respectively

Which of the following types of optical fibre has a very thin core of about 5μm diameter and has a relatively large cladding?

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single mode step index fibre

multi-mode step index fibre

multi-mode graded index fibre

none of them

A projectile is thrown at an angle of 30° with horizontal with a velocity of 980 m sec^-1. The time of flight to reach the highest point of its trajectory is:

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50 sec

100 sec

150 sec

250 sec

The blood pressure of the person

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Decreases with age

Increases with age

Remains the same

None

Experimental demonstration of wave nature of light was given in 1801 by

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New ton

Maxwell

Thomas young

Huygen

Femto means

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10^-15

10^-18

10^-2

10^-12

The terminal velocity of a drop of water of radius 1 x 10^-3 m moving through air (Given that h = 19 x 10^-6 kgm^-1s^-1)

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114.6 ms^-1

114.6 kms^-1

11.46 ms^-1

1.146 ms^-1

How much deep inside the earth (radius R) should a man go so that his weight become one-fourth of that one earth's surface?

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R/4

R/2

3R/4

None of these

In an inkjet printer, the toner drops are

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Charged

Not charged

Charged and deflected

None of these

The cars usually have cylinders on the crankshaft are

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2

3

4

6

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