Question # 1

A man sitting in a bus travelling in a direction from west to east with a speed of 40 km/h observes that the rain drops are falling vertically down. To the another man standing on ground the rain will appear

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To fall vertically down

To fall at an angle going from west to east

To fall at an angle going from east to west

The information given is insufficient to decide the direction of rain

Force is a:

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Scalar quantity

Base quantity

Derived quantity

None of these

The mechanics, which deals with the objects moving with velocities approaching that of light is called

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Relativistic mechanics

Wave mechanics

Quantum mechanics

Statics

A 120 m long train is moving in a direction with speed 20 m/s. A train B moving with 30 m/s in the opposite direction and 130 m long crosses the first train in a time

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6 s

36 s

38 s

None of these

Phenomenon of radioactivity is due to disintegration of

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nucleus

neutron

proton

molecule

The electric flux through any surface depends upon:

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Intensity of electric field

Area of the surface

Angle between intensity and area

All of these

None of these

A diode which can turn its current ON and OFF in nono seconds is called:

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LED

Photodiode

An ordinary diode.

Both (A) and (B)

Both (B) and (C)

An important part of photocopier is:

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Toner cartridge

Deflection plates

Charging electrode

Print head

None of these

The tidal energy is produced due to rotation of Earth relative to:

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Moon

Sun

Oceans

Water

The SI unit of magnetic induction is

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Gauses

Tesla

Weber

Weber²

According to the special theory of relativity, a moving clock

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runs faster

runs slower

neither runs faster nor slower

all of these

The path followed by a ballistic missile is called

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parabolic trajectory

ballisitic trajectory

both of them

none of them

On heating, glass gradually softens into a paste-like state before it becomes a very viscous liquid at almost

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600°C

7600°C

800°C

900°C

If force of friction is negligible, then acceleration of two free falling objects of different masses is

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The same

Different

Smaller mass has smaller acceleration

None of these

The product of mass flow per second with velocity is

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Momentum

Acceleration

Force

Displacement

In full wave rectification by bridge the number of diodes required are

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3

4

2

5

As the Δt approaches to zero, the limit of ratio Δω/Δt becomes

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Average acceleration

Variable angular acceleration

Instantaneous angular acceleration instantaneous

None of these

Which pair of the following force will never give resultant force of 2N?

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2 N and 2 N

1 N and 1 N

1 N and 3 N

1 N and 4 N

The unit of inductance is equivalent to

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∨xs/A

∨xA/s

∨ x s/v

∨/A x s

A typical rocket consists of fuel

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more than 60% of launch mass

less than 60% of launch mass

less than 80% of launch mass

more than 80% of launch mass

If the cover of a red book is observed in monochromatic blue light,It will appear

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White

Red

Black

Blue

The two electric charges originally 8 cm apart are brought closer together, until they are 2 cm apart the force between them is now greater by a factor

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2

4

8

16

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