Question # 1

P.E is equal to:

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mgh

1/2 mv²

W x F

None of these

1 hp is equal to :

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747 W

746 W

748 W

1000 W

According to Archimedes, up thrust is equal to :

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Weight of displaced liquid

Volume of displaced liquid

Mass of displaced liquid

None of these

The study of motion without reference to mass and force.

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Mechanics

Dynamics

Kinematics

None of these

A crate is moved by pulling the rope attached to it. it moves 10 m on straight horizontal read by a force of 100 N. How much work will be done when the rope is making an angle of 30° with the road?

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5 Joules

86 Joules

707 Joules

866 Joules

The velocity of freely falling bbodies moving upward.

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Decreases

Increases

Constnat

zero

Minor but rapid change in atmospheric pressure cause:

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Poor condition

Intense condition

Windy condition

Pleasant condition

What kind of waste is produced by nuclear power plant?

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Carbon di oxide

Radio active

Fuels

Toxic material

The devise used to measure the atmosphere pressure is:

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Rain gauge

Vacuum cleaner

Screw gauge

Barometer

What of the following is a god radiator of heat?

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a Shinning silvered surface

a dull black surface

a white black surface

a shinning colored surface

The formula of y component of force ' F ' is:

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F cos 𝜽

F Sin 𝜽

F tan 𝜽

Tan^-1 𝜽

A thermistor is a dependent resistors:

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Heat

temperature

energy

mass

The particles emitted from a hot cathode surface are:

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Positive ions

Negative ions

Protons

Electrons

The speed of sound in air is kmh^-1

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1243

1244

1245

1246

Who discovered the phenomenon of natural radioactivity?

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Henry Becurial

Merry Curi

Perry

Rutherford

Diffraction of wave can be observed clearly only when the size of slit or obstacle is nearly__________ to the wavelength of the wave:

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Two times

Equal

Four times

None of these

The center of curved surface of spherical mirror is called:

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Focus

Axis

Centre

Pole

The principal focus of a concave mirror is:

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Virtual

Real

Imaginary

Dual aspect

J.J Thomson observed deflection of cathode rays in:

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1895

1896

1897

1998

1 MB = ________________ Kilobytes

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1022

1023

1024

1025

100x10³ A= :

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10^-3 A

10^-2 A

10 A

10^-1A

Mathematical form of Ohm's law is:

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V = IR

V = I2R

V = Qt

V = IR2

The magnification of a convex lens of focal length 5 cm is equal to.

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5

6

10

23

The mechanism of transports energy of all the waves is

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Different

Same

Complicated

Easy

3 Joules of work id done is 3 seconds, then power

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6 Watt

1 Watt

3 Watt

2 Watt

For a gas obeying Boyle's Law, if the pressure is doubled, the volume becomes.

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Double

Three fold

One half

Remains the same

The work done in gravitational field

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Depend upon the path

Does not depend upon the path

(+)ve

Zero

The dimension of power is

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MLT-1

ML2T-2

ML2T2

ML2T-3

Original source of energy for biomass is

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Earth

Star

Moon

Sun

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 distance between two consecutive wave front is equal to

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One wave length

Two wave length

Half wave length

Three wave length

the velocity of sound is maximum at 20 ^oC in

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Lead

Copper

Glass

Iron

A charge on 4 coulomb is in the field of intensity 4N/C the force on the charge is.

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Uniform

Non uniform

Weak

Strong

Those materials whose resistivity becomes zero at certain temperature is called:

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Semiconductor

Super conductor

Conductor

Insulator

NAND gate represented by:

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X = A. B

X = A+B

X= A.B

X=|A+B|

The value of Wien's constant:

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2.9x10^-3mk

2.19x10^-7mk

3.18 x10⁶ km^-1

6.21 x 10^-9m²wk³

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

SI unit of reactance is.

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Ohm

Mho

Farad

Henry

Gauss's law can only be applied to.

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A curved surface

A flat surface

A closed surface

A surface of any shape

The materialization of energy take place in the process of.

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Photo electric effect

Compton Effect

Pair production

Annihilationof matter

Energy stored per uint volume inside a solenoid is called as

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energy density

Electric flux

Work

Volume charge density

The number of neutrons in Li are

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2

3

4

7

The emission of electrons from metal surface when exposed to light is called:

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Compton effect

Pair production

Photoelectric effect

None of above