Question # 1

A solar cell is also called:

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Photo cell

Generator

Battery

None

The speed of light is equal to:

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3 x 10⁵ ms^-1

3 x 10⁸ms^-1

3 x 10⁹ms^-1

3 x 10²ms^-1

The value of 'g' on the surface of moon is:

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1.62 ms^-2

10 ms^-2

20 ms^-2

Zero

The freezing point of Mercury is:

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49 ^oC

-49^oC

39^oC

-39^oC

When two bodies are in motion then the velocity of one body relative to the other is called.

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Relative velocity

Uniform velocity

Variable velocity

Average velocity

If force is capable of rotation a body in clockwise direction it is :`

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Clockwise

Anticlockwise

It has no direction

Nil

Which surface is bad emitter:

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White surface

Black surface

Coloured surface

Silver surface

In Einstin's mass energy equation, c is the :

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Speed of sound

Speed of light

Speed if volume

None of these

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 unit of kinetic energy is:

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J

N

Km

Pa

When a body is lifted through a height the work done on its appears in the form of its:

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Kinetic energy

Potential energy

Elastic potential energy

Geothermal energy

SI unit of electric intensity is:

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Watt

NC^-1

NS^-1

Nm

The symbol of AND operation is:

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+

-

.

*

The refractive index of ice is:

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1.00

1.33

1.31

2.42

Electric intensity is a quantity.

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Scalar

Vector

Base

None of these

To hear echoes, the minimum distance of the obstacle from source of sound should be:

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10 m

15 m

17 m

20 m

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

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90^o

60^o

75^o

45^o

The pitch of a sound is most closely related to its:

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Wave form

Period

Amplitude

Frequency

with the increase in temperature the resistance of pure metals:

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increases

decreases

remains same

none of these

Which type of image is produced by the converging lens of human eye if it views a distant object:

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Real, erect, same size

Real, inverted, diminished

Virtual, erect, diminished

Virtual, inverted, magnified

How does sound travel from its source to your ear:

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By changes in air pressure

By vibration in wires or strings

By electromagnetic waves

By infrared waves

The colour of live wire is:

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Black or blue

Green or yellow

White or grey

Red or brown

Pi radian is equal to.

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0^o

90^o

180^o

57.3^o

The difference between two molar capacities is equal to.

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Plank's constant

General gas constant

Molar gas constant

Boltzmann constant

Biomas is a potential source of

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Renewable energy

Non renewable energy

Botha a and b

Tidal energy

Substances that don't flow easily has

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Large co-efficient of viscosity

Small co-efficient of viscosity

Medium co-efficient of viscosity

Zero-coefficient of viscosity

The path followed by a projectile in known as its

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Range

Trajectory

Cycle

Height

Which one of the following is into directed along the axis of rotation

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Angular acceleration

Angular momentum

Centripetal acceleration

Angular displacement

when a ball is throng straight up, the acceleration at its highest point is.

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Upward

Down ward

Zero

Horizontal

Value of triple point of water is given as.

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Zero K

100 K

273.16 K

373.16 K

No body begins to move or comes to rest of itself was given by

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Newton

Pascal

Bernoulli

Bu Ali Sina

Which one of the following can not be polarized.

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Ultra violet rays

Radio waves

T.V. Waves

Sound waves

In rotational motion the analogous of mass is

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Angular acceleration

Torque

Moment of inertia

Angular momentum

Two down and one up quarks make

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Proton

Neutron

~~photon~~

Positron

If the potential difference across two plates of capacitor is doubled, then energy stored in it will be.

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Two times

Eight times

Four times

Remain same

In the equation if f₂ > then

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A diode characteristics curve is a plot between

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Current and resistance

Voltage and time

Voltage and current

Current and time

Coulomb /volt is called.

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Farad

Ampere

Joule

Henry

The ratio Beta in transistor is called.

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Voltage gain

Emitter gain

Current gain

Nuclear gain

Two up quarks and one down quarks makes a

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Proton

Newton

Photon

Meson

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

Photodiode is used for:

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Detection of current

Detection of heat

Detection of light

Both a & b

split rings are used in

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A.C. generator

A.C. motor

Transformer

D.C. motor

The magnetic field inside solenoid is given:

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μ_∘nI²

μ_∘nI

μ_∘n/1²

μ_∘I/n