Question # 1

In which of the following state molecules do not leave their position:

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Solid

Liquid

Gas

Plasma

Which of the following material lowers friction when pushed between metal plates:

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Water

Fine marble poder

Air

Oil

Land breeze from land to sea during:

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Day

Night

Afternoon

Morning

What is unit of momentum?

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Kg m/s

m

c

Nil

................. can be add algebraically.

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Scalar quantities

Vector

All

None

Sliding friction can be converted into rolling friction by using

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Levers

Wedges

Ball bearings

Pulleys

Specific heat of glass

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780 Jkg^-1K^-1

800 Jkg^-1K^-1

840 Jkg^-1K^-1

880 Jkg^-1K^-1

Solar energy is a type of.

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Renewable

Non-renewable

Natural

None

The weight of a body is 100 N its weight on moon is :

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0.17 Kg

1.7 N

17 N

170 N

The specific heat of glass is:

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501.72

500

501

502

A couple is formed by:

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two forces perpendicular to each other

Two like parallel forces

To equal and opposite forces in the same line.

Two equal and opposite forces not in the same line

Focal length for concave mirror is :

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-ve

+ve

same

none of these

A device which has two ways communication is:

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Television

Radio

Hard disk

Mobile phone

The displacement produced in the spring is directly proportional to force is called:

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Hook’s law

Boyle’s law

Newton’s law

Joule’s law

The phenomena used in capacitor is:

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electrostatic induction

induced current

electric field

electroscope

Which among the following radiation has more penetrating power?

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A beta pareticle

A gamma particle

An alpha particle

None of these

The speed of sound in iron at 25 ^oC is ms^-1

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5950

5900

6950

6940

The force applied on the mass attached with a spring is represented by:

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f_a

f_c

f_ext

f_s

The process by which electrons are emitted by a hot metal surface is known as:

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Boiling

Evaporation

Conduction

Thermionic emission

Boolean expression for AND operation is:

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X = A̅

X = A + B

X = A . B

X = A̅B̅

Which of the following characteristics of a wave is independent of the others:

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speed

frequency

amplitude

wavelength

What happens to the intensity of the brightness of the lamps connected in series as more and more lamps are added?

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Increases

Decreases

Remains the same

Can not be predicted

Time period of geostationary satellite of radius 'R' is

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1 hour

48 min

1 day

1 month

A finite volume of gas consists of

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Small no. of molecules

Large no. of molecule

Average no. of molecule

None of these

In vibrating string, the points where the amplitude is maximum are called.

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Nodes

Antinodes

Troughs

Crests

The dimension of viscosity are

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[M2L-2T2]

[M-1LT-1]

[M-1L-1T]

[ML-1T-1]

The wavelength of X-rays is of the order of.

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10^-8 m

10^-10m

10^-5m

10^-4m

No spark plug is needed in the

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Petrol engine

Diesel engine

Gas engine

Water engine

The ability of reveal the minor details of an object under examination is called.

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Resolving power

Magnification

Scattering

Reflection

Beats can be heard when difference of frequency is not more than.

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8 Hz

10 Hz

4 Hz

6 Hz

the locus of all pint in the same wave of vibration is called.

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Wave front

Diffraction

Interference

Polarization

Increase in speed of sound for 1 ^oC rise in temperature is.

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0.61 ms-1

0.61 cms-1

61 ms-1

6.1 ms-1

The word Fluid means

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To rise

To fall

To flow

To oppose

Using relativistic effects the location of an air craft after an hour fight can be predicated about

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20 m

50 m

760 m

780 m

When a coil is moved in a uniform magnetic field, an induced emf is produced due of change in

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Flux density

Electric flux

Magnetic flux

Magnetic field strength

Force per unit charge is called:

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Gravitational force

Electric field intensity

Coulomb's force

None of these

A block body is an ideal:

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Absorber

Radiator

Both a & b

None of above

Which one is pentavalent impurity

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Boron

Gallium

Antimony

Indium

EMF is induced due to change in

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Charge

Current

Magnetic flux

Electric field

A diode characteristics curve is a plot between

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Current and resistance

Voltage and time

Voltage and current

Current and time

Which one belongs to lepton's group

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Electron

Muons

Neutrons

All of these

When meta I is heated sufficiently electrons are given off by the metal. This phenomenon is known as.

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Photoelectric effect

Piezo electric effect

Thermionic emission

Secondary emission

1 rad =

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0.001Gy

0.01Gy

0.1Gy

1.01Gy

A rheostat can be used as variable resistor as well as a-------------

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Potential divider

Current divider

Wheat stone bridge

Power divider