Question # 1

Action and Reaction are always on:

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Same body

Different bodies

Any body

None of these

Water is _________ conductor:

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Best

Bad

Good

Poor

The sum of kinetic energy and potential energy of molecules or atoms is called.

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Temperature

Internal energy

Kinetic energy

Potential energy

The velocity of geostationary satellites with respect to Earth is

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Vo

2Vo

Zero

1/2 Vo

In which of the following state molecules do not leave their position:

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Solid

Liquid

Gas

Plasma

Tensile strain produces the change in the object.

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Length

Volume

Area

Density

Einstein's mass-energy equation is

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E = mc

E = mc2

E = 2mc

E = m2c

Heat can be transmitted form one object to the other by

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convection

radiation

conduction

all of these

One horse power is equal to:

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746 W

749 W

764 W

794 W

Land breeze from land to sea during:

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Day

Night

Afternoon

Morning

Worst absorber of heat is:

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Dull black surface

Coloured surface

Shinning silvered surface

White surface

The A.C. used in our houses has frequency _____ cycle/sec

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60

30

50

130

Information storage devices work on the principles of

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Heat

Sound

Light

Magnetism

The sound level of rustling of leave is:

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1 dB

20 dB

30 dB

10 dB

The point through which rays of light pass after reflection from concave mirror is called principal:

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Focus

Circle

Axis

Radius

If current is flowing from bottom end to the top end in a wire, according to right hand rule the direction of line of forces would be:

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Anti-clock wise

Clock wise

Left and Right

Along the conductor.

If we double the distance between two charges, then force becomes:

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4-times

¼ th

Double

Half

Power of convex lens is 10 D. Its focal length is:

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100 m

10 m

1 m

0.1 m

The maximum displacement from mean position is called:

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Maximum height

Time period

Amplitude

Interval

The speed of sound in the air at one atmospheric pressure at room temperature is:

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343 ms-1

346 ms-1

349 ms-1

339 ms-1

As the temperature of a conductor rises, its resistance:

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Increases

Decreases

Does not change

None of these

The S.I unit of power of a lens is:

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Dioptre

Volt

Ampere

Watt

One revolution is equal to.

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90^o

180^o

360^o

270^o

Blood pressure is measured by

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Hydrometer

Barometer

Sphygmomanometer

Galvanometer

A stretched string 2 m long and it has 2 hopes of stationary waves hen the wavelength is

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4 m

2 m

3 m

1 m

The acceleration produced by elastic restoring force is

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Perpendicular to force

Opposite to force

In same direction as force

Zero

A vector is denoted by

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Light face

Bold face

Both a and b

None of these

2 radian = ____

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2 m

4 m

57.3 m

114.6 m

the acceleration along x -axis direction in case of projectile is.

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Zero

Equal to gravity

Maximum

Constant

Cloud formation in atmosphere is an example of.

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Isothermal process

Isochoric process

Adiabatic process

Isobaric process

If the object is at 5 cm from the lens of simple microscope than its magnifying power will be.

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5

10

15

25

A body of mass 2 kg moving with velocity of 4 ms-1 has K.E. equal to.

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16 J

8 J

32 J

2 J

the angular version of F= ma is

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L = 1w

pi = 1a

l = pi a

f = mv/t

Helium-Neon laser discharge tube contains neon

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82%

15%

25%

85%

Two down and one up quarks make

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Proton

Neutron

~~photon~~

Positron

Electromagnetic induction is exactly according to law of:

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Momentum

Charge

Energy

Mass

The principle regarding the dual nature of light was first discovered by

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Compton

J.J.Thomson

De-Broglie

Heisenberg

Shunt resistance is

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Low resistance

Zero resistance

High resistance

Impedance

A radio active substance has a half life of four months. 3 -fourth of the substance will decay in:

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6 months

8 months

12 months

16 months

If a low resistance is connected parallel to a galvanometer then galvanometer is converted.

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Ammeter

Voltammeter

Ohmmeter

Multimeter

Production of x rays is reverse process of

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Photo electric effect

Compton effect

An nihilation

Pair production

The ability of a body to return to its original shape is called.

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Strain

Stress

Elasticity

Plasticity

The electrons in one coulomb change is equal to.

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1.6 x 10^-19

2.25 x 10^-19

6.25 x 10^-18

6.25 x 10^-19

A device that shows the visible path of ionizing particle is called.

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GM counter

Solid state detector

Scalar

Wilson cloud chamber