Question # 1

Boyle's law is applicable in

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Isochoric process

Isothermal process

Isobaric process

Isotonic process

According to Einstein, with the great increase in the speed of the body, the relativistic mass of the body

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Remains constant

Decreases

Increases to infinity

Reduced to zero

The strength of magnetic field at certain points around a wire depends upon:

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Value of current passing

Distance from the current element

Color of the material

Both (A) and (B)

Both (B) and (C)

The velocity gained by the fluid in falling through the distance (h_{1 - h}_{2) under the action of gravity is equal to the speed of the action of gravity is equal to the speed of the}

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orifices

efflux

fluid

none of them

Neutron was disvovered by:

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Rutherford in 1920

Chadwick in 1922

Bohr in 1913

Compton in 1927

None of these

Examples of crystalline solids are:

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Cooper

NaCl

Zirconia

Both (A) and (B)

All of these

Amount of heat required to raise the temperature of a body through 1 K is called its

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Specific heat

Water equivalent

Thermal capacity

Entropy

The product of cross-sectional area of the pipe and the fluid speed at any point along the pipe is called

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constant rate

volume rate

flow rate

steady rate

Most practical applications of electricity involve

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Charges at rest

Charges in motion

Electrons at rest

Atoms in motion

Molecules in motion

The nuclei of an element having the same charge number but different mass numbers are called:

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Isobars

Isotopes

Isomers

Isobaric

Isothermal

For a moving body, at any instant of time

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If the body is not moving the acceleration is necessarily zero

If the body is slowing, the retardation is negative

If the body is slowing, the distance is negative

If displacement, velocity and acceleration at that instant are known, we can find the displacement at any given time in future

If the instantaneous velocity of a body does not change. the body is said to be moving with

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average velocity

uniform velocity

instantaneous velocity

variable velocity

The pressure exerted by the gas is

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directly proportional to the P.E

inversely proportional to the P.E

inversely proportional to the K.E

directly proportional to the K.E

Root out of the conventional source of energy:

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Energy from biomass

Hydroelectric energy

Geothermal energy

None of these

A water hose with an internal diameter of 20 mm at the outlet discharges 30 kg of water in 60 s. What is water speed at the outlet if density of water is 1000 kg/m³during its steady flow

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1.3 m/s

1.6 m/s

1.9 m/s

2.2 m/s

Plan of a coil makes an angle of 20º with the lines of magnetic field. The angle between B and vector area of plane of coil is:

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Also 20º

70º

90º

180º

None of these

The first super conductor was discovered in

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1811

1890

1901

1911

A potential barrier of 0.7V exists across p-n junction made from:

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Germanium

Silicon

Arsenic

Gallium

Indium

A snooker ball moving with velocity V collides head on with another snooker ball of same mass at rest. If the collision is elastic, the velocity of second snooker ball is

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Zero

Infinity

V

2 V

When temperature increase, the frequency of a tuning fork

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Increases

Decreases

Remains same

Increase or decreases depending on the material

Max Planck received the Nobel Prize for his discovery of energy quants in:

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1718 AD

1918 AH

1818 AD

1918 AD

None of these

The passage of current is accompanied by a magnetic field in the surrounding space:

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Always accompanied

Sometimes accompanied

Never accompanied

Any of above

None of these

The penetration power ofβ-particle is

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zero

less thanα-particle

equal toα-particle

greater thanα-particle

An electronic computer is basically a vast arrangement of electronic switches which are made from

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Resistors

Transistors

N -type crystals

P-Type crystals

Capacitors

The photoelectric effect, the maximum energy of photoelectrons depends on the

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particular metal surface

frequency of incident light

both of them

none of them

A high temperature, the proportion of shorter wavelengths radiation, emitted by the body

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decreases

first increases then decreases

increases

any one of them

Ohm established a relation between

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voltage and resistance

voltage and charge

voltage and current

voltage resistance and charge

A train of 150 m length is going towards north direction at a speed of 10 ms^-1. A parrot files at a speed of 5 ms^-1towards south direction parallel to the railway track. The time taken by the parrot to cross the train is equal to

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12 s

8 s

15 s

10 s

The relationship between Boltzmann constant k with R and N_Ais given as:

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k = RN_A

k =R/N_A

k = NR/N_A

None of these

When a shall explodes a mid-air, the total momentum of its fragments is

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less than the momentum of shell

equal to the momentum of shell

greater than the momentum of shell

none of them

The induced current in a conductor depends upon:

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Resistance of the loop

Speed with which the conductor moves

Any of these

Both A and B

None of these

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