Question # 1

The gravitational force has the ________ relation with the distance between two masses:

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Direct

Inverse

Constant

None

___________ helps us to pick up objects.

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Force

Weight

Friction

Nil

_____________ is an other unit of power.

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J

W

hp

W/J

One Megawatt is equal to :

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1 × 106 w

1 × 102 kw

1015 w

Nil

A line about which a body rotates is called;

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Axis of rotation

Rigid Body

Center of gracity

None of these

What kind of waste is produced by nuclear power plant?

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Carbon di oxide

Radio active

Fuels

Toxic material

The unit of torque is:

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N

Nm

m

m/n

If f = 40 N is applied and bus is move 1m than work is :

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40 J

60 J

80 J

No work

F = Kx is mathematical form of which law:

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Law of gravity

Hooke's Law

Einstein's theory

It is just relation

Wood, cork,cotton, wool , rubber are the examples of:

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Conductor

Thermal conductor

Insulator

Both a & b

At sea level , Atmosphere pressure is:

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101,300 Pa

101,400 Pa

101,500 Pa

101, 600 Pa

F=

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qE

q-E

q/E

q+E

Time period is reciprocal of:

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Frequency

Cycle

Wavelength

Amplitude

diamond des not conduct electricity, because it has no:

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free electrons

free protons

free neutrons

free positive charge

Which device is used to store charge:

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Resister

Capacitor

Dielectric

Fuse

Give the number of factors which affect the ability of a capacitor to store charge.

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2

3

4

5

To see from submarine and the ship at the surface of water, we use:

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Telescope

Microscope

Periscope

Prism

In electric motor, the brushes are made of:

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Lead

Graphite

Iron

Wood

The base of computer operation are:

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1,2

0, 1

0, 2

1, 10

In totally reflecting prism one angle is of 90^o, and other two angles are of:

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30^o,30^o

45^o,90^o

45^o,45^o

40^o,40^o

Ripple tank is an instrument which is used to study the characteristics of:

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Mechanical waves

Light waves

Radio waves

Electro-magnet waves

To hear echo, the distance between the observer and the obstacle is 17m then how much distance will the sound travel?

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60m

54m

17m

34m

The portion of the wave above mean level is called.

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Node

Antinode

Crest

Trough

Minimum number of unequal forces whose vector sum can be zero are.

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5

4

3

2

According to Huygen's principle the points on primary wave front can be considered as

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Secondary wavelets

Ray of light

Source of light

None of these

Speed of sound in vacuum is

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280 ms-1

332 ms-1

333 ms-1

Zero ms-1

In simple harmonic motion the velocity of a particle is maximum at.

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Extreme position

Mean position

In between extreme and mean position

None of them

Carnot cycle consists of.

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Two steps

Three steps

Four steps

Five steps

Soap film is sunlight appears coloured due to.

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Dispersion of light

Diffraction of light

Scattering of light

Interference fo light

The apparent change in the pitch of sound due to relative motion is called.

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Carnot theorem

Interference

Doppler effect

Beats

The mathematical expression for the restoring force is.

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F = kx

F = ma

F = dp/dt

F = -kx

The internal energy of a piece of lead when beaten by hammer will.

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Increase

Decrease

Remains constant

Increases and then decrease

Angular momentum has the same unit as

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Impulse x distance

Power x time

Linear x time

work x frequency

5 A of current flows through a conductor in 2 minutes, charge in the wire is.

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500 C

600 C

400 C

10 C

S.I unit of strength of electric field is

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J/C

C/V

V/C

N/C

Using relativistic effects the location of an air craft after an hour fight can be predicated about

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20 m

50 m

760 m

780 m

The SI unit of magnetic induction 'B' Tesla is equal to.

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NA-1m-1

Nam-1

NA-1 m

Na2m-1

In Wilson cloud chamber, ß-particles leave

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Thin and continuous tracks

Thick and continuous tracks

No tracks

Thin and discontinuous tracks

The north pole of a magnet is brought near a metallic ring. The direction of induced current in the ring will be:

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Antoclockwise

Clockwise

First Clockwise and then Antoclockwise

First anticlockwise and then Clockwise

A current carrying conductor experience maximum magnetic force in a uniform magnetic field when it is placed.

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Perpendicular to field

Parallel to field

At an angle of 60 ^o to the field

None of these

The illustration of the phenomenon of mutual induction is in the device of

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Transformer

Inductor

A.C. Generator

Ammeter

Joule second is the unit of.

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Energy

Wein's constant

Planck's constant

Boyle's law

When gama rays are emitted, the nuclear mass.

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Decreases by 4 units

Does not change

Increases by 2 units

Increase by 1 unit

The crystalline structure of NaCl is.

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Cubical

Hexagonal

Tri gonal

Tetragonal