Question # 1

A real gas can be approximated to an ideal gas at

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Low density

High pressure

High density

Low temperature

A particle having the mass of electron and charge of a proton is called a

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photon

position

antiproton

antineutrino

In a building, there are 15 bulbs of 40 watts, 5 bulbs of 100 watts, 5 fans of 80 watts and a heater of 1 kilowatt. The voltage of the electric main is 220 volts. The minimum efficiency of the main fuse of the building will be

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0.4 A

11.4 A

9.8 A

10.6 A

Ohm established a relation between

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voltage and resistance

voltage and charge

voltage and current

voltage resistance and charge

A particle having mass and charge equal to that of an electron is called:

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Proton

Positron

Pion

Pi-meson

Both (C) and (D)

Hydrogen atom with only one proton in its nucleus, and one electron in its orbit is called

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deuteron

deterium

protium

tritium

When the charged particle is projected at right angles to the field, then experienced by it will be:

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Maximum

Zero

qvB

Both (A) and (B)

Both (A) and (C)

Particles have the mass smallest of following is:

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Electron

Proton

Neutron

Quark

A p-n junction is formed when a crystal of silicon is growth in such a way that its one half is doped with trivalent impurity and the other half with a impurity from

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2nd group

fourth group

fifth group

sixth group

Chock consumes externally small

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Charge

Current

Power

Potential

A current carrying conductor is placed at right angle to the magnetic field. The magnetic force experienced by the conductor is

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minimum

maximum

zero

none of these

The crystalline structure of NaCl is

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rectangular

hexagonal

tetrahedral

cubical

A spectrometer is used to find

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Wavelength of light

Refractive index of the prism

Angle of minimum deviation of prism

All of these

The phenomenon of polarization proves that the light waves are

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Transverse wave

Longitudinal waves

Stationary waves

None of these

Polarization of material in an electric field is a

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Permanent phenomenon

Purely a temporarily phenomenon

Time dependent phenomemon

None of these

Between layers of liquid in relative motion, viscosity introduces

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Tangential forces

Radial forces

Intermolecular forces

Cohesive forces

A typical rocket ejects the burnt gases at speeds of over

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4000 ms^-1

5000 ms^-1

6000 ms^-1

None of these

The substances which break just after the elastic limit is reached, are known as

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brittle substances

ductile substances

plastic substances

elastic substances

The symbol K and G have been used to denote respectively:

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Young's modulus and bulk modulus

Young's modulus and shear modulus

Bulk modulus and shear modulus

Any of these

None of these

The length of a telescope is 36 cm.The focal lengths of its lenses can be

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30 cm,6 cm

-30 cm,-6 cm

30 cm,-6 cm

-30 cm,-6 cm

A pulsating DC can be converted into constant voltage by using

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Filter

Full wave rectifier

Half wave rectifie

Bridge rectifier

The centripetal force for a car moving on a road is given by

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Friction due to tyres

Force of brakes

The driver of the car

Force by steering wheel

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