Question # 1

Thermometer, which is most suitabel for measuring rapid changing temperatures is.

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Constant volume gas therometer

Resistance thermometer

Thermocouple

Liquid in glass thermometer

Magnetic field lines.

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Are colosed

Are farthest at poles

Intersect each other

Do not pass in vacuum

Earth's magnetic field intensity is.

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Constant every warre

Very low at poles

Varies place to place

Very high at equator

Materials which does not regain its original hape after remvoal of the load producing deformationare termed as.

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Rigid materials

Hook's materials

Plastic materials

Elastic materials

One unit of horsepower is equivalent

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716 W

746 W

736 W

756W

Thrust force is a consequence of which law of motion.

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First

Second

Third

Fourth

Physics is a branch of

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Biological science

Physical Science

Life science

Social science

Inertia of a body is related to which of the following quantitiies

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Friction

Force

Mass

Weight

Which one is a non -physical quantituty.

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Density

Colour

Time

Distance

Which branch of science plays vital role in technology and negineering.

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Biology

Chemistry

Physics

Geology

A car, an ele;phant and a cricket ball have same kinetic energies, Which of these have greater speed.

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Car

Cricket ball

All have same speed

Elephant

In D.C.motor split rings are made of:

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Steel

Carbon

Copper

Iron

A current carrying conductor produces a field around it is called:

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Electric field

Magnetic field

Both a and b

None of these

The totally reflectiing prism one angle is of:

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45^o

90^o

180^o

120^o

Radiations present in atmosphere due to the presence of different radioactive elements are:

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Cosmic radiations

Background radiations

secondary radiations

Electromagnetic radiations

Mathematical form of Ohm's law is:

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V = IR

V = I2R

V = Qt

V = IR2

an ideal voltmeter is that which draws:

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small current

no current

high current

none of these

The refractive index of ice is:

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1.00

1.33

1.31

2.42

A digital multimeter is used to measure:

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Current

Resistance

Potential difference

All of above

A device which has two ways communication is:

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Television

Radio

Hard disk

Mobile phone

Radio waves are:

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Electric waves

Electromagnetic waves

X-rays

Radio active ways.

Focal length for concave mirror is :

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-ve

+ve

same

none of these

Bright fringes are also called as

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Minima

Maxima

Wave front

Ray of light

The waves used in radar speed trap are

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Longitudinal

Sound wave

Micro waves

Matter waves

Dot product of two non zero vectors is zero it angle between them is.

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30^o

60^o

45^o

90^o

Not change in entropy of a system after one complete Carnot cycle is.

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Positive

Negative

Zero

None of these

The magnifying power of an astronomical telescope is 10. If the focal length of objective is 100 cm, then what is the focal length of eye piece.

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10 cm

100 cm

1000 cm

5 cm

Physical quantiaties are divided into

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Two Categories

Six categories

Three categories

None of these

When a body is vibrating its displacement from mean position

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Remains constant

Changes with time

Become(-)ve

None of these

Direction of a vector in space requires

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Two axis

Three axis

Four axis

Both a and b

Which of the following is not directed along the fixed axis of rotation.

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Angular displacement

Angular momentum

Centripetal acceleration

Angular acceleration

Total change in momentum of an isolated system is

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Always (+) ve

Always (-) ve

Has maximum value

Zero

A body starting from rest attains angular acceleration of 5 rad s-2 in 2 second final angular velocity will be.

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10 rad s-1

7 rad s-1

3 rad s-1

2 rad s-1

X -rays are similar in nature to.

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Gama rays

Beta rays

Alpha rays

Cathode rays

When a pot difference of 4 volt is applied across resistance, 10 J of energy is converted Find charge flows

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0.20 C

2.5 C

5.0 C

10.0 C

The powers of two electric bulbs are 100w and 200w. Which are connected to power supply of 220 V. The ratio of resistance of their filament will be:

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1:2

2:1

1:3

4:3

Balmer Empirical formula explains the electromagnetic radiation of any excited atom in terms of their.

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Energy

Mass

Wave length

Momentum

For accurate measurement of current through a circuit, the resistance of ammeter should be

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Very small

Very high

Neither small nor high

None of the above

A proton consists of quarks which are.

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Two up, one down

One up, two down

All up

All down

If the length and number of turns of a solenoid are doubled strength of magnetic field with.

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Be doubled

Become half

Not change

Be four time

The natural frequency of L.C circuit is equal to

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the current which flows from a point at higher. potential to point at lower potential is called.

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Electric current

Conventional current

Either of these

None of above

In Compton effect the photon behaves as a.

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Wave

Particle

Nucleon

Both a and b

When a wire of length 'l' and resistance R is cut into two equal parts then resistivity of each part.

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is doubled

Remains the same

Is halved

Is one fourth