Question # 1

Law of Gravitation is consistence with:

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1st Law of motion

2nd Law of motion

3rd Law of motion

Law of momentum

Heat radiation obey the laws of:

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Absorption

Reflection

Both A and B

None

The unit of gravitational constnat is:

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Nm² kg

Nm²kg^-2

Nm²kg^-1

N - m²

There are ______ modes of transfer of heat:

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1

2

3

4

From following, which one is a renewable source of energy?

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Coal

Gas

Sunlight

Petrolum

See breeze blows form sear to land during:

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day

night

after noon

morning

Latent heat of vaporization is denoted by:

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H1

Hm

Hv

Hf

Acceleration is produced by 20 N force it is due to:

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Inertia

Force

Momentum

None

1 micro =

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10^-3

10^-6

10^-2

10^-12

If the velocity of the body becomes double then its kinetic energy will:

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Remain the same

Become double

Become four times

Become half

The freezing point of Mercury is:

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49 ^oC

-49^oC

39^oC

-39^oC

If focal length of a lens is 1m, then its power will be:

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1 D

0.5 D

1.5 D

1 D

The ray of the light after reflection from concave mirror passes through:

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Centre

Principal focus

Pole

None of these

In computer terminology, proceed data is called:

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Software

Program

Information

Digital data

The colour of live wire is:

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Black or blue

Green or yellow

White or grey

Red or brown

If X = A,B, then X is 1 when:

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A and B are 1

A or B is 0

A is 0 and B is 1

A is 1 and B is 0

If there is no extension in the spring then the position is called:

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Equilibrium position

unequilibrium

neutral equilibrium

stable equilibrium

An object is placed 6 cm away in front of a concave mirror that has 10 cm focal length. Determine the location of the image:

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-5 cm

-10 cm

-15 cm

-20 cm

A dielectric must be:

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Resistor

Insulator

Good conductor

Semi conductor

The line which passes through pole of the mirror and center of curvature is called principal:

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Axis

Focus

Line

None of these

It is used in satellite communication:

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Radio waves

Micro waves

Light waves

Electrical waves

One coulomb is equal to charge of ________ electrons.

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6.25 x 10^-19

6.25 x 10¹⁹

6.25 x 10¹⁸

6.25 x 10^-18

An athlete runs with a speed of 12 ms-1. Determine the longest jump he can undertake.

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12 m

14.4 m

24 m

16.2 m

The word Fluid means

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To rise

To fall

To flow

To oppose

A body rotating with angular velocity of 2 radian/s and linear velocity is also 2 ms-1, then radius of circle is.

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1 m

0.5 m

4 m

2 m

A quantity which indicates the state and direction of a vibrating body is known as

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Time period

Amplitude

Phase

Frequency

Speed of sound in copper is

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38000 ms-1

3600 ms-1

3500 ms-1

3400 ms-1

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

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1.5 m/s

3.5 m/s

2.5 m/s

4.5 m/s

Total change in momentum of an isolated system is

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Always (+) ve

Always (-) ve

Has maximum value

Zero

The frequency of 2nd pendulum is

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0.5 Hz

1 Hz

1.5 Hz

2 Hz

The terminal velocity of a droplet falling down under gravity is directly proportional to the square of

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Its density

Its radius

Its viscosity

Its elasticity

A man of mass 5 kg is falling freely, the fore acting on it will be

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5 N

9.8 N

19.6 N

49 N

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Unit vector

+ve of a vector

Resultant vector

-ve of a vector

One of the applications of electrostatic induction is

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Laser

Photocopier

X ray machine

Wilson cloud chamber

Which one of the following is polymeric solids

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Glass

Nylon

Copper

Zinc

The unit of radioactivity is:

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Bequerel

Henry

Pascal

Joule

The P.D develop in case of silicon is:

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0.7V

0.3V

0.5V

0.9V

The moderator used in a nuclear reactor

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Sodium

Uranium

Graphite

Cadmium

The photo copying process is called

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Xerography

Inkjet Printer

Both (a) and (b)

None of these

A positron is a particle having.

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Mass equal to electron

Charge equal to electron

Mass equal to mass of electron but charge opposite to charge of electron.

Mass equal to proton

In RLC circuit the energy is dissipated in

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R only

R and L

R and C

L and C

The mass of beta particle is equal to the mass

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Proton

Neutron

Electron

Photon

If the frequency of A.C. supplied is doubled then the capacitive reactance becomes.

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Half

Two

Four times

One fourth

Einstein was awarded Nobel prize in physics in

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1905

1911

1918

1921