Question # 1

When a body is performing S.H.M., its acceleration is

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inversely proportional to the displacement

directly proportional to the applied force

directly proportional to the amplitude

directly proportional to the displacement but in opposite direction

Which of the following are the units of intensity of light

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Pois

Lux

Siemen

Candela

If a molecule with momentum mv strikes a wall and rebound then the change in momentum will be:

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-2 mv

Zero

2 mv

mv

When heat is removed from the system

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negative

positive

zero

any one of them

For a fixed force, larger is the mass of a body the

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greater is its acceleration

smaller is its acceleration

smaller is its weight

zero is its acceleration

Which of the following is an example of SHM(in ideal situations)

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Motion of simple pendulum

Motion of horizontal spring man system

Motion of violin string

All of these

Addition of 2.189 kg, 11.8 kg and 5.32 kg gives the rounded off answer as:

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19.398

19.400

19.4

19.3

If a car rest acceleration uniformly to a speed of 144 km/h in 20 s it covers a distance of

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20 m

400 m

1440 m

2880 m

The energy stored in a charge capacitor

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1/2CV²

1/2C²V

1/2C/V²

None of these

The maximum drag force on a falling sphere is 9.8 N, it weight is

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1 N

9.8 N

4.9 N

Cannot be calculated

A body falls freely from rest. It covers as much distance in the last second of its motion as covered in the first three seconds. The body has fallen for a time of

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3 s

5 s

7 s

9 s

The reciprocal of decay constant λ of a radioactive material is:

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Frequency

Half life

Year

Mean life

None of these

An object thrown upward with an initial velocity at certain angle with the horizontal and moving freely under the action of gravity is called

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a rocket

an aeroplane

a projectile

a ballon

The combined effect of resistance and reactance in a.c. circuit is called

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conductance

resistance

impedance

choke

The number of "Earth stations" which transmit signals to satellites and receive signals from them are:

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3

24

126

200

Blood has a density

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Equal to water

Greater then water

Lesser then water

None of these

When a conductor is moved across a magnetic field, the redistribution of charge sets up:

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Magnetic field

Electrostatic field

Electromagnetic field

All of these

None of these

Every crystalline solid has

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definite melting point

different melting points

may or may not be definite

none of them

Kirchhoff's first rule is also called:

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Loop rule

Thumb rule

Point rule

Right hand rule

None of these

If a body reaches a speed equal to the speed of light, then its mass will became

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zero

very small

infinity

none of these

Work is product of:

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Force and velocity

Heat and energy

Force and displacement

None of these

Acceleration of a body is positive, if the velocity of the body is

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constant

increasing

decreasing

none of them

NmA^-1is commonly called:

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Weber

Apmere

Guass

Coulomb

None of these

0.10 cm can be written as:

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1.0 x 10^-2m

1.0 x 10^-3cm

1.0 x 10^-4cm

1. x 10^-4m

The tidal energy is due to gravitational pull of :

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sun

moon

Mars

None of these

Bernoulli's equation is applicable for

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turbulent flow

streamline flow

both (a) and (b)

all kinds of flows

The effects of bends in a wire on its electrical resistance are:

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Zero

Much larger

Larger

Smaller

None of these

Free electrons are

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tightly bound

fixed

loosely bound

tightly fixed

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

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KHz

MHz

GHz

BHz

The angle between centripetal force and displacement of the body moving in a circle is:

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0°

90°

180°

None of these

Which quantity has different dimensions:

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Work

Pressure

Energy

Torque

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