Question # 1

The mass of a body

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Decreases when accelerated

Increases when accelerated

Decreases when moving with high velocity

None of the above

A couple is formed by

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Two forces perpendicular to each other

Two like parallel forces

Two equal and opposite forces in the same line

Two equal and opposite forces not in the same line

Two equal but unlike parallel forces having different lines of action produce:

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a Torque

a couple

Equilibrium

Netural equilibrium

Mass of earth is Me is :

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Me = 6× 1024 kg

6× 1024 kg

7× 1024 kg

6× 1024 Mg

According to law of conservation of energy increases K.E is equal to:

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Increase P.E

Decrease P.E

Decrease K.E

None of these

In Fahrenheit scale, upper refrence point is:

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32 ^oF

212 ^oF

180 ^oF

100 ^oF

The quantity that depends upon the force and increases with decrease in the area on which force is acting is called

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Momentum

Pressure

Mass

Velocity

Kgms^-2 is equal to:

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Joule

Mole

Newton

Watt

The net torque acting on a rotating body with uniform speed is:

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0

1

2

5

1 Pa is equal to

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NM

NM-1

JS

NM-2

All are conductors except:

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Copper

Wires

Steel

Wood

Which animal have ability to move his eye lens:

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Snake

Fish

Ant

Tiger

In a convex mirror the size of the image:

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Is smaller than the size of the object

Is greater than the size of the object

Depends upon the position of the object

Is equal to the size of the object

Capacitors that are used in resonant circuits that tune radios to particular frequencies, such circuits are called:

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Series circuits

Filter circuits

Parallel circuits

AC circuits

Capacitors are mainly used for radio frequency tuning:

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Paper capacitor

Air capacitor

Mica capacitor

Electrolytic capacitor

The speed of sound in air at 21 °C is:

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336ms^-1

343ms^-1

430ms^-1

470ms^-1

The speed of sound was accurately measured in:

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1736

1737

1738

1739

AND operation is represented by:

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Dot (.)

Addition (+)

Division (÷)

Minus (-)

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

Image formed on a camera is:

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Real, inverted, and diminished

Virtual, upright and diminished

Virtual, upright and magnified

Real, inverted and magnified

Astronauts is space need to communicate with each other by radio links because:

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Sound waves travel very slowly in space.

Sound waves travel very fast in speace

Sound waves cannot travel in space

Sound waves have low frequency in space

A positive electric charge:

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Attracts other positive charge

Repels other positive charge

Attracts a neutral particle

Repels a neutral particle

The work done in gravitational field

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Depend upon the path

Does not depend upon the path

(+)ve

Zero

The relation between the speed and hoop can be written as

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2

4

1/2

1/4

Fringe spacing in Young's double slit experiment increases due to increase in.

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Slit separation

Wave length

Order of Fringe

Frequency of source

A 2 meter of high tank is full of water. If a hole appears at its middle, then the speed of efflux is.

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4.4 ms-1

10 ms-1

6.2 ms-1

20 ms-1

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Who did give the correct formula for the speed of sound in air?

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Boyle

Laplace

Newton

Einstein

Food rich in proteins is:

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potato

grapes

vegetables

bread

The optical fibre is covered for protection by

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Glass jacket

Plastic jacket

Steel jacket

Diamond jacket

If a body revolves under centripetal force its angular acceleration is

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Non zero

Variable

Increasing

Zero

The resultant of two forces 30 N and 40 N acting parallel to each other is.

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30 N

40 N

70 N

10 N

the velocity of sound at 0 ^oC is 332 ms-1, the velocity of sound at 10 ^oC will be

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337.1 ms-1

338.1 ,ms-1

342.1 ms-1

328.1 ms-1

Base of transistor is of order:

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10^-11m

10⁶m

10^-8m

10^-6m

Terminal potential difference is greater than emf of the cell when

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Circuit is open

Circuit is closed

small battery is charged by bigger battery

None of these

Helium Neon Laser Beam emitted from discharge tube has a colour.

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Blue

Green

Red

Black

the force between two charge is 28 N. If paraffin wax of relative permittivity 2.8 is introduced between the charges as medium, then the force reduces to.

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25 N

20 N

10 N

15 N

Direct current can not flow through.

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Inductor

Resistor

Transistor

Capacitor

Commutator was invented by:

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William bills

William Gates

William tells

William Sturgeon

For workers in nuclear facilities is, a weekly does of is normally considered safe

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1.0 msv

5.0 msv

2.0 msv

3.0 msv

The amount of energy equal to 1.6 x 10^-18 J is called.

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One volt

One milli volt

One electron volt

One mega electron volt

The conductor experience force, placed in magnetic above:

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Move towards weaker part of field

Move towards stronger part of field

Remains at rest

Move upwards in space

The process of copying is:

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Axillugraphy

Chromatography

Xerography

Spectrography

If 13.6 eV energy is required to ionize the hydrogen atom, then the required energy to remove an electron from n=2 is:

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10.2 eV

0 eV

3.4 eV

6.8 eV