Question # 1

The value of g on moon's surface is 1.6 ms^-2. what will be the weight of a 100 kg body on the surface of the moon?

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100 N

160 N

1000 N

1600 N

The value of gravitational constant "G" is Nm² kg^-2

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6.67 x 10^-21

6.67 x 10^-11

6.67 x 10^-23

6.67 x 10¹¹

The quantities that are completely decribed by only magnitude are.

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vector

Scalar

Base

Derived

In a dam the water energy is called:

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Heat energy

Electrical energy

G.P.E

Mechanical enrgy

The density of water is:

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5500 kgm^-3

10000 kgm^-3

1000 kgm^-3

330 kgm^-3

Metals are good conductor of heat dut to the:

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Free electron

Big size of their molecule

Small size of their molecules

Rapid vibrations of their atoms

The process in which heat is transfer due to actual movement of molecule is called.

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Conduction

radiation

Convection

All of these

Newton related inertia of the body with its

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Weight

Mass

Density

Force

The work done in lifting a brick of mass 2 kg through a height of 5 m above the ground will be:

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2.5 J

12.5 J

50 J

100 J

There are ways to transfer the heat from one place to another.

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1

2

3

4

If K = 150 N/m and elasticity is 0.20 m than:

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F = 30N

F= =31N

F = 32N

F = 29N

The speed of sound is air at 21 ^oC is:

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336 ms^-1

343 ms^-1

430 ms^-1

470 ms^-1

parallel plate consists of 2 metal plates separated by:

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conductor

insulator

wooden plate

plastic foam

The output of a NAND gate is 0 when:

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Both of its inputs are 0

Both of its inputs are 1

Any of its inputs is 0

Any of its inputs is 1

What happen to the atomic number of an element which emits one alpha particle and a beta particles.

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Increases by 1

Stay the same

Decrease by 2

Decrease by 1

Electron gun has an electrode called for controlling the flow of electrons in the beam:

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Plate

Grid

Screen

Filament

An example of input device of computer is.

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Key board

Printer

Monitor

RAM

If a wave moves in a slinky spring with frequency of 4Hz and wave length of 0.4m, the speed of the wave will be:

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1.0 ms-1

1.2 ms-1

1.4 ms-1

1.6 ms-1

In a vacuum all electromagnetic waves have the same:

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Speed

frequency

amplitude

wavelength

The mirror whose inner surface is reflecting is called:

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Concave mirror

Convex mirror

Mirror

Lens

Floppy has a storage capacity

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4-5 MB

3-4 MB

1-3 MB

3-6 MB

The S.I unit of power of a lens is:

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Dioptre

Volt

Ampere

Watt

When two identical waves superimposed, which can change.

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Wave length

Frequency

Velocity

Amplitude

Two vector can be added by simple arithmetical method when they are at an angle of.

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120^o

90^o

0^o

45^o

An oil film on water surface shows colour due to.

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Diffraction

Interference

Polarization

Dispersion

In young's double slit experiment for the interference the central region will be

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Dark

Bright

Coloured

None of these

The magnifying power of a convex lens of focal lendth 10 cm is

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7

9.6

11

3.5

During adiabatic process, which factor remains constant.

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Entropy

Pressure

Momentum

Power

Which one of the following can not be polarized.

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Ultra violet rays

Radio waves

T.V. Waves

Sound waves

The unit of rotational K.E. is

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rAD/SEC

Js

J

Kgm2

A man of 5000 kg moves with an acceralation of 1 ms-2 force acting on it is.

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5 N

500 N

50 N

5000 N

If the wave motion is 0.01 sec and wave speed is 100 ms-1 then frequency of wave is.

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0.5 Hz

1 Hz

10 Hz

100 Hz

Artificial gravity can be created in the space ship by

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Revolving around the earth

Spinning around its own axis

Increasing its velocity

Decreasing it svelocity

Michael Faraday and Joseph Henry belongs to

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England and USA

France and USA

China and USA

None of these

Einstein was awarded Nobel prize in physics in

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1905

1911

1918

1921

The SI unit of decay constant is

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m

m^-1

S^-1

Nm^-1

A proton is about 1840 time than an electron. When it is accelerated by a potencial difference if 1 kV, its kinetic energy will be:

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1884 ke V

1/1840 keV

1 keV

920 keV

Farad is defined as

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"Coulomb/Volt

Ampere /Volt

Coulomb /Joule

Volt/Coulomb

The charge number of Ba is.

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197

141

56

85

The resistivity of two wires isρ₁ andρ₂ which are connected in series. If there dimentions are same then the equivalent resistivity of the combination will be:

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(ρ₁ +ρ₂)

1/ρ₁+ 1/ρ₂

ρ₁+ρ₂/2

ρ_1/ρ₂

amu =

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1.06 x 10^-27 kg

1.6606 x 10^-27 kg

1.520 x 10^-21 kg

1.6606 x 10^-31 kg

Yield stress is another name of

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Plasticity

Proportional limit

Elastic limit

Both (b) and (c)

The product of resistance and conductance is

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1

Resistivity

Conductance

Zero

In current carrying long solenoid the magnetic field produced does not depend upon.

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The radius of solenoid

Number of turns per unit length

Current flowing through solenoid

All of the above