Question # 1

In solids, Heat is transferred by:

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Radiation

Conduction

Convection

Absorption

If the force of 25 N pulls a stone through a distance of 5 cm in its direction the magnitude of work will be:

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5 J

125 J

175 J

200 J

As we go up the density of air in the atmosphere:

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Decreases

Increases

Remain constnat

None of these

Rate of doing work is called:

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Energy

Torque

Power

Moment

The approximate weight of 80 gram mass on the surface of Earth is

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800 N

80 N

0.8 N

8 N

___________ varies with height.

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Weight

Pressure

Mass

Energy

The fastest bird falcon has speed.

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100 kmh^-1

200 kmh^-1

300 kmh^-1

400 kmh^-1

In how many division Fahrenheit scale is divided?

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100

273

180

50

How much force is needed to body of mass 10 kg from falling:

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100 N

150 N

200 N

300 N

Anything that rotates around a planet is called:

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Star

Sun

Moon

Satellite

If the velocity of a body becomes double, then its kinetic energy will:

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Remain the same

Become double

Become four time

Become half

the range of galvanometer to measure current is:

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few amperes

few micro amperes

few milli amperes

mega amperes

The combined resistance of two identical resistors, connected in series is 8Ω. Their combined resistance in a parallel arrangement will be:

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2 Ω

4 Ω

8 Ω

12 Ω

Number of poles in a magnet is:

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One

Two

Three

Unlimited

The digits used in electronics are:

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1

0

0 and 1

1 and 2

SI unit of electric potential is:

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watt

volt

coulomb

joule

Which particles are nucleons?

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Electrons and protons

Protons and neutrons

Electrons and neutrons

Electrons and positrons

LDR can act as:

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Diode

Switch

Transistor

Rectifier

Which waves of the following has highest frequency?

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Radio waves

Micro waves

Light wave

Sound wave

Which is used to investigate the properties of electron beam:

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LDR

Electroscope

Proton gun

Electron gun

To get a design on the computer screen by moving a pointer with the help of mouse is called:

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word processing

graphic designing

data managing

telecommunication

The brain of any computer system is:

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Monitor

Memory

CPU

Control unit

Venturimeter is used ot measure.

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Speed of fluid

Pressure of fluid

Volume of fluid

Mass of fluid

Damping is the process in which energy

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Increases

Remains constant

Dissipates

None of these

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

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Angular velocity

Linear momentum

Angular momentum

Angular acceleration

One radian is equal to.

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75.3^o

57.3^o

35.7^o

73.3^o

Light waves emitted from a source spread in

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Specific direction

All direction

Upward direction

None of these

The efficiency of diesel engine is about

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25% to 30%

35% to 40%

40% to 50%

50% to 60%

The motion of gas molecules is

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In the same direction

Random

Walls of container

Opposite to each other

If the slope of the velocity time graph remain constant then body is moving with.

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Uniform velocity

Negative variable acceleration

Variable acceleration

Uniform acceleration

The potential energy to the molecules of an ideal gas is considered to be.

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Maximum

Zero

1/2 kx²

1/2 kx

When two waves of same frequency travel in opposite direction, the phenomenon will be

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Diffraction

Stationary waves

Polarization

Interference

Rate of change of displacement is called

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Speed

Velocity

Kinetic energy

None of these

The symbol of p-n-p transistor is

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Which particle has larger range in air.

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Alpha rays

Gama rays

Beta rays

Neutron

The unit of temperature co efficient of resistivity is.

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Ohm -m

K-1

K

Ohm

e/m=

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v/Br

Br/V

VB/r

Vr/B

The negative sign with induced emf in Faraday's law is in accordance with

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Lenz's law

Amperes law

Boyle's law

Gauss law

In the equation if f₂ > then

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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 value of Stefan is constant is:

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4.57 x 10^-8 m²k²

5.67 x10^-8 wm^-2k^-4

6.67x 10^-11 wm²k⁴

7.45 x 10^-9 m² wk³

The energy of photon is givne by

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mv2/2

hf

Va e

mac¹

A dot represents the direction of magnetic field.

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Out of page

Into the page

Tangent to page

Parallels to page

Which one of the following physical quantities change with relativistic speed?

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Length

Time

Mass

All of above