Question # 1

Experimentation and practical verification was fist indroduced by

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The Muslim Scientists

The Greek philosopher

The European scientsts

None of these

A communication satellite is used ot reflect the signal of.

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Microwaves

Radio waves

y rays

x -rays

The subtraction of a vector is equivalent to the addition with

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Same direction

Perpendicular direction

Reversed direction

All of these

The value of of 'g' at the centre of the earth is

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Infinite

2 g

3 g

zero

If a vector of magnitude 10 N along y-axis then its component along x-axis is

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0 N

5 N

8.66 N

10 N

The speed of sound in air would become double than ots speed at 10^oC at a temperature of.

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313 ^oC

586 ^oC

859^oC

899 ^oC

Multimode graded index fibre has a core whose diameter range lie from.

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5 to 50 micro meter

50 to 100 micro meter

40 to 1000 micro meter

50 to 10,000 micrometer

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The horizontal range of a projectile of 30^owith horizontal is same at an angle.

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40^o

45^o

90^o

60^o

The wavelength of X-rays is of the order of.

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10^-8 m

10^-10m

10^-5m

10^-4m

For working of heat engine, there must be.

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A source

A sink

either of these

Both of these

At which place the motion of a simple pendulum will be slowest.

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Karachi

K-2

Murree

Lahore

Which of the following is a set of supplementary units

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Radian and kilogram

Radian and Steradian

Steradian and time

Mole and radian

This is used for

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Co-efficient of friction

Co-efficient of expansion

Co-efficient of viscosity

Co-efficient of contraction

the systolic pressure of normal healthy person is.

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120 torr

130 torr

115 torr

110 torr

In S.H.M, the acceleration of the body is directly proportional to

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Weight of body

Applied force

Amplitude

Displacement

Kg ms-1 can also be written as

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Nm

Ns

Ns-1

Js

Two tunign forks of frequencies 260 Hz and 256 Hz are sounded together , the number of beats per second is.

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2

258

516

4

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