Question # 1

A body OF mass 10 kg taken to height of 5m:

Choose an answer

P.E = 500 J

P.E = 50 J

P.E = 5 J

P.E = 5000 J

Water starts boiling at:

Choose an answer

80 °C

100 °C

90 °C

101 °C

Those objects which do not conduct electricity are called.

Choose an answer

Insulator

Semi conductor

Nil

Conduct

The radius R of Earth is

Choose an answer

6.4 x 106 m

6.4 x 108 m

6.4 x 1010 m

6.4 x 1012 m

Mass of earth is approximately _________

Choose an answer

3.7 x 10²⁴ kg

25.94 kg

6.0 x 10²²kg

6 x 10²⁴kg

It is useful to know the location of center of gravity of a body in problem dealing with

Choose an answer

Motion

Equilibrium

Charge

Velocity

Evaporation takes place from liquid :

Choose an answer

Everywhere

Above surface only

Below surface only

Middle of liquid

The first man who gave the idea of gravity:

Choose an answer

Hero

Einstein

Newton

Faraday

The work done in lifting a brick of mass 2 kg through a height of 5 m above the ground will be:

Choose an answer

2.5 J

12.5 J

50 J

100 J

Glider pilots use __________ movement of hot air currents due to convection of heat:

Choose an answer

Downward

Upward

Left

right

Normal human body temperature is :

Choose an answer

15°C

98.6°C

37°C

37°F

One micro coulomb charge is equal to:

Choose an answer

10^-3c

10³c

10⁶c

10^-6c

The energy is transferred from one place of another:

Choose an answer

through matter

through waves

both a and b

through vacuum

When a ray of light enters from denser medium to rare medium, the angle of incidence for which angle of refraction is 90° is called:

Choose an answer

Angle of incidence

Critical angle

Angle of refraction

Angle of deviation

If the displacement in spring is ‘x’ of mass “m” attached with a spring then restoring force is:

Choose an answer

F=ma

F=kx

F=-kx

F= m/a

In NOT gate number of input terminals is/are:

Choose an answer

1

2

3

4

At mean position of pendulum, the potential energy of the pendulum is:

Choose an answer

Maximum

Minimum

Much more

Both a and c

In the presence of a charged body, an insulated conductor develops positive charge at one end and negative charge at the other end, this i- called:

Choose an answer

Electrostatics

Electrostatic induction

Magnetism

Electromagnetic induction

Which is the most suitable means of reliable continuous communication between an orbiting satellite and earth:

Choose an answer

Mecrowaves

Radio waves

Sound waves

Any light waves

Totally reflecting prism turns the incident ray at an angle of:

Choose an answer

90^o

60^o

75^o

45^o

The way of doing business by using web is called:

Choose an answer

Sources of entertainment

Web business

E-commerce

E-mail

an ideal voltmeter is that which draws:

Choose an answer

small current

no current

high current

none of these

A wheel of radius 50 cm having an angular speed of a rad /s have linear speed.

Choose an answer

1.5 m/s

3.5 m/s

2.5 m/s

4.5 m/s

The distance between two consecutive crests of troughs is called

Choose an answer

Time period

Wave length

Frequency

Displacement

Carnot cycle consists of.

Choose an answer

Two steps

Three steps

Four steps

Five steps

The SI unit of power is

Choose an answer

Joule

Newton

Watt

Kilowatt

Turning of radio is example of.

Choose an answer

Mechanical resonance

Electrical resonance

Physical resonance

Biological resonance

The speed of sound in ari at 0 ^oC is 332 ms-1, Then the speed at 40 ^oC will be

Choose an answer

372 ms-1

356 ms-1

346 ms-1

332 ms-1

First law of thermodynamics can be defined by the equation

Choose an answer

Stationary waves are generated on a string of high l, if tension is increased , frequency of vibration will

Choose an answer

Decrease

Unchanged

Half

Increases

If focal length of objective and eye piece is 0.5 m and 10 cm respectively then magnifying power of telescope will be.

Choose an answer

0.5

5

10

20

In stationary waves, the velocity of particle at the node is.

Choose an answer

Maximum

Infinite

Zero

Varible

The distance between two consecutive wave front is equal to

Choose an answer

One wave length

Two wave length

Half wave length

Three wave length

When a coil is moved in a uniform magnetic field, an induced emf is produced due of change in

Choose an answer

Flux density

Electric flux

Magnetic flux

Magnetic field strength

Subatomic particles are divided into groups.

Choose an answer

Photon

Laptons

Hadrons

All of these

Photo copier and inkjet printer are the applications of

Choose an answer

Magnetism

Electricity

`.Electro magnetism

Electrostatics

when an inductor comes close to a metallic object, its inductance is.

Choose an answer

Decreased

Increased

Becomes half

Becomes 4 times

When a conductor moves across a magnetic field an emf is set up this emf is called.

Choose an answer

Variable emf

Constant emf

Back emf

Induced emf

A changing electric flux creates.

Choose an answer

Electric fields

Gravitational

Magnetic field

Electric charge

A device used for detection of current is called.

Choose an answer

Inductor

Voltmeter

Capacitor

Galvanometer

In photovoltaic cell, current is directly proportional to.

Choose an answer

Wavelength of light

Intensity of light

Energy

Frequency of light

A charge Q is divided into tweo parts q and Q-q and seperated by a distance R. The force of equilibrium between them will be maximum when:

Choose an answer

q=Q/4

q=Q/2

q=Q

None of these

A 50 mH coil carries a current of 2.0 a , then energy stored in tis magnetic field is.

Choose an answer

0.1 J

10 J

100 J

1000 J

If the distance between the two charged bodies is halved, the force between them becomes.

Choose an answer

Double

Half

Four times

One times