Question # 1

A bullet of mass 0.05 kg has a speed of 300 ms-1. Its kinetic energy will be.

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2250 J

4500 j

1500 J

1125 J

Physics is a branch of

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Biological science

Physical Science

Life science

Social science

A force is acting on body but causes no displacemtn. The work done on the body is

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Negative

Zero

Positive

Infinite

When the slope of a body's displacemnt time graph increase the body is moving with

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Constant velocity

Increasign velocity

Decreasing velocity

All of these

A force n 5 N is applied to a body weighing 10 N. Its accelerationin m/s2 is

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0.5

2

5

50

If a body is at rest or moving with uniform rotational velocity, then torqu acting on the boyd will be.

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Zero

Maximum

Minimum

Infinite

Which of the following is a base unit.

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Mole

Pascal

Coulomb

meter per second

You throw a ,it opens fully underwater, spreading out its mesh evenly.Compared to the moment it left your hand, where in the net\s center of mass now.

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Unchanged from its position when thrown

At the same depth but slightly shifted horizontally

Higher is the water column

Loweer in the water column

Four students measure the diameter of a cylinder with vernier callpers. Which of the following readings is

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3.4 cm

3.47 cm

3.5 cm

3.475 cm

Pressure of liquid in a container increase with

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Depth

Volume

Mass

Base

Which one is the quicket method to magnetize a material

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Strike with hammer

Putting inside a current carrying coil

Moving into magnetic field

Stroking the opposite pole

Diffraction of wave can be observed clearly only when the size of slit or obstacle is nearly ………. To the wavelength of the wave:

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Two times

Equal

Four times

Half

Radiations present in atmosphere due to the presence of different radioactive elements are:

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Cosmic radiations

Background radiations

secondary radiations

Electromagnetic radiations

A digital multimeter is used to measure:

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Current

Resistance

Potential difference

All of above

Mathematical relationship between critical angle "C" and refractive index "n" is:

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N = C

N = 1 / sin c

N = 1 / cos c

N = 1 / sin2 c

The temperature at the centre of sun is.

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10 million k

20 million k

30 million k

35 million k

Positive charge in an electric field always tend to move:

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Does not move

From lower to higher potential

From higher to lower potential

All of these

The formula of time period of simple pendulum is:

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T = 2π √L/g

T = 2π (L/g)

T = 2π√1/g

T = 1/2π √L/g

Two switches attached in series work on which operation?

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AND operation

OR operation

NOT operation

NOR operation

Which form of energy is sound?

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Electrical

Mechanical

Thermal

Chemical

The electrostatic force acting on two charges each of 1C separated by 1m is about:

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9X10⁹ N

9X10^-9 N

9X10⁸ N

9X10^-8 N

The angle at which prism deviates the incident ray is called:

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Angle of incident

Angle of reflection

Angle of deviation

Angle of minimum deviation

When a particle is moving along a circular path its projection along the diameter executes

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Linear motion

Vibratory motion

Rotatory motion

SHM

The motion of gas molecules is

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In the same direction

Random

Walls of container

Opposite to each other

The minimum number of correctly positioned communication satellites to cover whole populated earth is.

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2

3

100

200

Number of seconds in a day is

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9000 sec

3600 sec

86400 sec

43200 sec

Cloud formation in atmosphere is an example of.

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Isothermal process

Isochoric process

Adiabatic process

Isobaric process

Force 12 N and 5 N are add, the resultant con not be

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13 N

6 N

7 N

17 N

A man weight 1000 N in a stationary lift. If the lift moves up with an acceleration of 10 ms-2. then its weight becomes.

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1000 N

2000 N

3000 N

0 N

The rate of change of angular velocity is called

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Angular velocity

Angular acceleration

Angular displacement

Angular speed

Energy dissipated usually appears as

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P.E.

Heat Energy

Chemical energy

Nuclear Energy

The weight of the body at the centre of earth is

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Maximum

Minimum

Zero

Infinite

The potential energy to the molecules of an ideal gas is considered to be.

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Maximum

Zero

1/2 kx²

1/2 kx

Induced emf in A.C. generator can be increased by

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Decreasing area of coil

Decreasing magnetic field

Increasing area of coil

Slowing down speed of coil

In A.C. inductor behaves as

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Capacitor

Resistor

Commutator

Transistor

In an N-type silicon, which of the following statement is true?

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Electrons are majority carriers & trivalent atoms are the dopants

Electrons are majority carriers & pentavalent atoms are the dopants

Holes are minority carriers & pentavalent atoms are the dopants.

Holes are minority carriers & trivavalent atoms are the dopants.

In extrinsic semiconductors doping is of the order of.

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1 atom to 10⁴

1 atom to 10⁶

1 atom to 10⁸

1 atom to 10³

Doping is made comparatively larger in

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Emitter

Base

Collector

P -type semi conductor

In three phase A.C. generator the phase difference between each pair of coil is.

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45^o

90^o

120^o

60^o

The electric flux through closed surface depends upon

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Charge

Medium

Geometry

Charge and Medium

Colour codes are used to calculate the.

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Nature of resistor

Numerical value of resistance

Potential difference

Current

if time constant in RC series circuit is small, then capacitor is charged or discharged.

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Slowly

Rapidly

At constant rate

Intermittently

In a coil current change from 2 to 4 A in .05 s . If the average induced emf is 8 V then coefficient of self-inductance is:

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0.2 henry

0.1 henry

0.8 henry

0.04 henry

The particles which do not experience strong force are called.

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Baryons

Hadrons

Mesons

Laptons