Question # 1

If the length of second pendulum becomes four times then its time period will become

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Four time

Two times

Six times

Eight times

When the particles of the medium vibrate about their mean position, along the direction of the motion of waves, then the waves are called:

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Longitudinal waves

Transverse waves

Water waves

Complex waves

The number of input terminals of an op-amp is:

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One

Two

Three

Four

None of these

Transformer is used to

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Increase alternating current

Increase d.c voltage

Increase & Decrease emf

All answers are right

According to the de-Brogile relation, an object of large mass and ordinary speed has

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very small wavelength

very large wavelength

very small frequency

all of these

Astrophysics is a branch of physics, which deals with

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Sub-atomic

Stars and galaxies

Light and sound

Music

The restoring force is ______ amd opposite to the applied force within _____:

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Equal, elastic limit

Different, the walls of the laboratory

Different, elastic limit

None of these

An induced current can be produced by

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Constant magnetic field

Changing magnetic field

Varying electric field

Constant electric field

None of these

When the mass of the colliding body is much larger than the mass of the body at rest, its velocity after collision.

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Becomes half

Becomes zero

Ramains same

Becomes double

Laser is a beam of:

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Visible light

Infra red light

Ultra violet light

Violet light only

yellow light only

The permeability of free space is measured in:

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Wb/Am

Wb A/m

Am/Wb

m/Web A

None of these

Electric field lines emerge the charges in

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One dimension

Two dimensions

Three dimensions

None of these

The error is constant for ______ error

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Random

Systematic

Both (a) and (b)

None of these

Polymers have naturally combinations like with

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Oxygen

Sulphuric

Hydrocarbons

Oxygen and carbons

Which force is the medium independent force ?

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Electrostatic force

Nuclear force

Gravitational force

All of them

The quantity mr² is known as

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Moment arm

Moment of inertia

Moment of force

None of these

In newton's rings see through the reflected light, centeral spo is:

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Bright

Dark

Either of the Two

None of these

When temperature increases, viscosity of liquids

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Remains constant

Increases

Decreases

Becomes double

Two bullets are fired simultaneously,horizontally and with different speeds from the same place.Which bullet will hit the ground first?

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The faster one

Depends on their mass

The slower one

Both will reach simultaneously

A lens of 2 cm focal length is to be used as a magnifying glass. Its magnification is

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13.5

12.5

0.5

2.5

The Earth rocks are in molten and partly molten state, usually within the Earth surface of

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5 km

10 km

15 km

18 km

What is the time taken by light to travel 4 mm in a material of refractive index 3

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4 x 10^-11 s

2 x 10^-11 s

16 x 10^-11 s

8 x 10^-11 s

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