Question # 1

The tendency of doing work is called :

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Time

Energy

Force

Area

That force which produces an acceleration of one metre per second per second in a body of one kilogram mass is called

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1 joule

1 newton

1 watt

1 ampere

If heat Q flows in time 't' through some metal then rate of flow of heat is defined as

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Flow of heat = 2Qt

Flow of heat = Q/t

Flow of heat = t/Q

Flow of heat = Qt

Brownian motion is an example of.

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Linear motion

Random motion

Circular motion

Vibratory motion

What flower is known as natural thermometer?

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Rose

Barasicca

Crocus

Tulip

A body OF mass 10 kg taken to height of 5m:

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P.E = 500 J

P.E = 50 J

P.E = 5 J

P.E = 5000 J

The kinetic energy of a body of mass 2 kg is 25 J. Its speed is:

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5 ms^-1

12.5 ms^-1

25 ms^-1

50 ms^-1

The product of force and distance is :

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Force

Work

Torque

Nil

In ___________ (CFC) was found reacting with ozone.

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1920s

1970s

1950s

1960s

Heat form one of a metal rod a reaches to the other by the process of

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convection

radiation

conduction

both (a) and (b)

If the distance is doubled between two masses. The gravitational force will decrease:

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4 times

2 times

One forth

One third

The mirror whose inner surface is reflecting is called:

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Concave mirror

Convex mirror

Miroor

Lens

A data storage device is:

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Printer

Hard disk

Monitor

CPU

If we double the distance between two charges, then force becomes

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4-times

1/4th

Double

Half

In A.C. generator flux will be zero if coil is to the field.

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90^o

45^o

Parallel

Inclined

When resistances are connected in series the current passing through them is:

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Different

Zero

The same

None of these

Which memory consists of integrated circuits?

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Primary memory

Audio cassette

Video cassette

Compact cassette

Instrument used for detecting and testing the nature of charge on a body is called:

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Incubator

Spectroscope

voltmeter

electroscope

Electric motor converts electrical energy into:

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Chemical energy

Solar energy

Heat energy

Mechanical energy

Optical fibers work on the principle of:

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Refraction

Reflection

Total internal reflection

Diffraction

SI unit of electric intensity is:

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Watt

NC^-1

NS^-1

Nm

The half life of radium - 226 is 1620 years. If N is its total amount then after the four half lives, its left amount will be:

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1/2 N

1/4 N

1/8 N

1/16 N

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

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Dark

Bright

Coloured

None of these

Diffraction is a special type of

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Reflection

Polarization

Interference

Refraction

the systolic pressure of normal healthy person is.

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120 torr

130 torr

115 torr

110 torr

An oscillating mass-spring system produces

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Sound waves

Electromagnetic waves

Light waves

Periodic waves

The time period of an oscillating mass spring system is 10 second. If mass attached to spring id doubled then time period becomes.

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10 sec

20 sec

5 sec

None of these

Venturimeter is used ot measure.

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Speed of fluid

Pressure of fluid

Volume of fluid

Mass of fluid

When the amplitude of a wave become double, its energy becomes

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One half

Two times

Three times

Four times

The produce oscillation, body is pulled away from its

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Mean position

Extreme position

Both a and b

None of these

The product of cross sectional area of a pipe and speed of fluid along the pipe is

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Zero

Maximum

Constant

Variable

The regular or steady flow of fluid is called

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Stream line

Turbulent flow

Average flow

None of these

Young in 1801 performed experiment for the first time about

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Interference

Diffraction

Polarization

Particle nature of light

Which consumes small power.

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Inductor

Resistor

Motor

All of these

Electro magnetic waves emitted from radio antenna are.

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Stationary

Longitudinal

Transvers

Both a and b

Wave nature of light appears in

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Pair production

Compton effect

Photo electric

Interference

Compton effect proves.

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Wave nature of radiation

Wave nature of particle

Dual nature of particle

Particle nature of radiations

The reactance of inductor depends upon

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L

All of the above

The name of the scientist who noted that a compass needle was deflected when placed near the current carrying conductor

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Henry

Faraday

Coloumb

Oersted

The most abundant isotope of neon is:

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Neon 21

Neon 20

Neon 22

None of above

Some charge is being given to a conductor. Then its potencial

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Its maximum at surface

Its maximum at Its maximum at center

Is remain same throughout the conductor

Is maximum somewhere between surface and centre

1 rad =

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0.001Gy

0.01Gy

0.1Gy

1.01Gy

If current flowing through a solenoid becomes four times, then magnetic field inside becomes.

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two times

three times

four times

Half

During electrolysis process, density of CuSO₄ solution

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Remains constant

Decreased

Increased

None of these