Question # 1

Stress is defined as

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Stress = Force/ Area

Stress = Area/Force

Stress = Area/ Volume

Stress = Mass/ Volume

What should be approximate length of a glass tube to construct of water barometer?

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0.5 m

1 m

2.5 m

11 m

If the direction of motion of the force is perpendicular to the direction of motion of the body, then work done will be

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Maximum

Minimum

Zero

None of these

More radiation is reflected by the surface.

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White

Coloured

Black

Rough

The force acting on unit area at surface of a body is called:

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Strain

Elasticity

Force

Stress

Which one of the following units is not a derived unit?

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Pascal

Kilogram

Newton

Watt

If Fy = 4 N and Fx = 3 N , what is the magnitude of resolution of force.

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5 N

7 N

10 N

15N

If the mass of moving body in a circle is doubled then centripetal force wil be:

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Doubled

Half

4 times

Same

When ice is cooled below 0 ^oC it:

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Expand

Contracts

Boils

None of these

The S.I unit of power is:

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Newton

Watt

Joule

Coulomb

The weight of body on earth with mass 8 kg is:

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10 N

100 N

80 N

8 N

In simple harmonic motion, the acceleration of the body is…………. Proportional to the displacement.

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Inversely

Directly

Equally

Ration

AND operation is represented by:

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Dot (.)

Addition (+)

Division (÷)

Minus (-)

Public address system is the example of :

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Analogue electronics

Digital electonics

Binary system

None of these

The data stored in C.D. is.

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680 MB

650 MB

700 MB

750 MB

The symbol of alpha particles is:

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4AHe

42He

0-1B

00Y

electroscope can also be charges by the process of:

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electrostatics

electricity

convection

conduction

In mathematical form of Ohm's law, "R" is:

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Resistance

Specific resistance

Resistor

Resistivity

Level of noise recommended in eight, hour work day:

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80-90 dB

80-85- dB

85-90 dB

90-95 dB

The refractive index of ice is:

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1.00

1.33

1.31

2.42

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

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Telescope

Microscope

Periscope

Prism

Electric field lines:

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always cross each other

never cross each other

cross each other inthe region of strong field

cross each other in the region of weak field

The speed of light was measured correctly by

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Galileo

Michelson

Newton

Maxwell

The waves used in radar speed trap are

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Longitudinal

Sound wave

Micro waves

Matter waves

What would encourage trade between two countries

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Different tax system

Frontier checks

National currencies

reduced tariffs

In rotational motion the torque is equal to rate of change of

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Angular velocity

Linear momentum

Angular momentum

Angular acceleration

The term in Bernoulli's equation has the same unit as

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Work

Volume

Pressure

Force

Increase in the velocity of sound in air for 1 ^oC rise in temperature is.

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61 ms-1

0.61 ms-1

161 ms-1

261 ms-1

Almost all the raw energy is librated from

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Heat

Earth

Light

All of these

A bat finding its correct location by sending

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Matter waves

Ultrasonic waves

Infrasonic waves

electromagnetic waves

When a body moves in circular motion, the angle between linear and angular velocity is.

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180^o

90^o

60^o

75.3^o

The SI unit of work is

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Newton

Joule

Mol

Calorie

A₁b₁= A₂b₂represents

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Stock's law

Newton's law

Equation of continuity

Brenoulli's equation

An electromagnetic wave goes from air to glass which of the following does not change?

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Radio waves

X-rays

Ultra violet radiation

Ultra sond waves

The radioactive decay obeys the law

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Which one of the following is ductile substance.

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Copper

Lead

Wrought iron

All of them

Torque on a current carrying coil

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τ=IBA cos

τ = ILB sinα

τ = IBA sinα

τ = ILBcosα

Cosmic rays consist of

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Protons

High energy photons

Positron

All of above

Platinum wire becomes white at a temperature of.

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1600^oC

1300^oC

1100^oC

900^oC

Galvanometer is sensitive when C/BAN is

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zero

Large

small

Negative

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 current induced can be increased by:

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Using a stronger magnetic field

Moving the loop faster

Replacing the loop bay coi of many turns

All of above

Donor impurities are

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Germanium, silicon

Indium, galium

Antimony, arsenic

Diamond, carbon

The color code of "Green"

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8

3

5

7