Question # 1

Moon is nearly km away from the Earth:

Choose an answer

3,80,000 km

3800 km

3,80 km

38 km

A black dull surface is a good ________ of heat:

Choose an answer

Emitter

Absorber

Reflector

Both A and B

What will be the magnitude of work if a force of 25N pulls a stone through a distance of 5 m in its directions

Choose an answer

25 J

50 J

75 J

125 J

There are ______ modes of transfer of heat:

Choose an answer

1

2

3

4

A material of thermometer should has:

Choose an answer

Visible

High freezing point

Low melting point

All of these

Center of gravity of an irregular shaped body can be found with help of:

Choose an answer

Screw guage

Plumbline

Meter rode

Wedge

The radiation from sun is:

Choose an answer

Alpha

Gamma

Radio

Ultraviolet

hp stands for :

Choose an answer

1w

Horse power

Joule

All are true

The symbol of sigma is :

Choose an answer

Σ

m

=

$

The weight of a body of mass 20 kg is:

Choose an answer

2 N

10 N

20 N

200 N

The weight of a body is 100 N its weight in deep space is :

Choose an answer

100 N

50 N

25 N

0 N

battery is one of the source of:

Choose an answer

heat

light

current

sound

the resistance of conductor is inversely to:

Choose an answer

temperature

length

area of cross section

pressure

The symbol of atomic mass number is:

Choose an answer

A

X

N

Z

Which is not a hardware:

Choose an answer

CPU

Window

Keyboard

Mouse

Which of the following reasons increase the importance of computer?

Choose an answer

Speedy

Long time storage of memory

Quick decision

All of these

If there is divergence of leaves by touching a body with electroscope then the body is:

Choose an answer

Semi conductor

Neutral

charge body

Insulator

Five joules of work is needed to shift 10 C of charge from one place to another. The potential difference between the places is:

Choose an answer

0.5 V

2 V

5 V

10 V

The output of a two input NOR gate is 1 when:

Choose an answer

A is 1 and B is 0

A is 0 and B is 1

Both a and b are 0

Both a and b are 1

Shock absorbers in automobiles are one practical application of:

Choose an answer

SHM

Random motion

Damped motion

None of these

During S.H.M acceleration of the body is maximum at:

Choose an answer

Mean position

Extreme positions

Between mean & Extereme

None of these

The closed switch in Boolean expression is represented by:

Choose an answer

0

1

10

2

Angular acceleration is produced by

Choose an answer

Power

Torque

Pressure

Force

The commercial unit of electric energy is

Choose an answer

Kilo watt hour

watt

Watt hour

Kilo Watt

One revolution is equal to.

Choose an answer

90^o

180^o

360^o

270^o

The magnifying power is also called

Choose an answer

Resolving power

Angular magnification

Strength of eye

None of these

The unsteady flow of a fluid is called

Choose an answer

Stream line

Turbulent flow

Average flow

Viscous flow

Intensity of light depend on

Choose an answer

Wave length

Amplitude

Velocity

Frequency

One complete round trip of a body is called

Choose an answer

Displacement

Time period

Vibration

Frequency

Choose an answer

Light waves are

Choose an answer

Longtail waves

Transvers waves

Stationary waves

Mechanical wave

If a rocket is accelerating upward with an acceleration of 2 g, an astronaut of weight, mg in the rocket shows apparent weight.

Choose an answer

Zero

Mg

2 mg

3 mg

The angle between x-axis, y-axis and z-axis is

Choose an answer

45°

60°

75°

90°

When the back emf is zero, its draws.

Choose an answer

Zero current

Minimum current

Maximum current

Steady current

Photo copier and inkjet printer are the applications of

Choose an answer

Magnetism

Electricity

`.Electro magnetism

Electrostatics

Dielectric constant _εr for air is:

Choose an answer

1

1.006

1.0002

1.0006

Due to polarization, electric field E.

Choose an answer

Increase

Decrease

First increases then decreases

Remain same

A material which is insulator at 0 K and conduct at room temperature is.

Choose an answer

Silver

Lead

Germanium

Polythene

Choose an answer

Wien's constant

Planck's constant

Davison constant

Lumber's constant

The mass of beta particle is equal to the mass

Choose an answer

Proton

Neutron

Electron

Photon

With the speed of motor, magnitude of back emf

Choose an answer

Remain same

Increase

Decrease

First increases then decreases

Two oppositely charged balls A and B attract the third ball C, when placed near them turn by turn The third ball C must be.

Choose an answer

Positively charged

Negatively charged

Electrically neutral

Positively and negatively charged

Commutator was invented in

Choose an answer

1834

1820

1840

1835

A proton is about 1840 time than an electron. When it is accelerated by a potencial difference if 1 kV, its kinetic energy will be:

Choose an answer

1884 ke V

1/1840 keV

1 keV

920 keV