Question # 1

In a transistor, if the central region is n-type, then this type of transistor is known as

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n-p-n transistor

p-n-p transistor

either of these

none of these

The restoring force always directed towards the

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extreme position

mean position

both of them

none of them

According to the Bernoulli's equation, where the speed of the fluid is high, the pressure will be

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low

zero

high

all of them

The measure of the deformation in a solid when stress is applied to its is called

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elastic constant

young's modulus

strain

elasticity

If the two charges in Coulomb's law have double distance between them, then electric force

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Becomes two-fold

Becomes four-fold

Remains the same

None of these

Above the curie temperature, iron becomes

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ferromagnetic

paramagnetic

diamagnetic

any one of them

The phenomenon of generation of induced emf is called

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Electrostatic induction

Magnetic induction

Electromagnetic induction

Electric induction

Both (A) and (D)

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

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photon

position

antiproton

antineutrino

Which of the following is an example of a S.H.M?

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motion of a projectile

motion of a train along a circular path

motion of swing

electrons revolving sound the nucleus

The internal energy of a system does not depend upon the

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initial state of the system

final state of the system

path

none of them

The process which is carried out at constant temperature is known as

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adiabatic process

isothermal process

isochoric process

none of them

When the p-n junction is forward biased its resistance is of the order of

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few mega ohms

few kilo ohms

few ohms

few milli ohms

The coefficient of linear expansion of iron is 0.000011 per°K. An iron rod is 10 metre long at 27°C. The length of the rod will be decreased by 1.1 mm when the temperature of the rod changes to

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0°C

10°C

17°C

20°C

The word amorphous means:

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Without any structure

With definite structure

Regular arrangement of molecules

Both (B) and (C)

None of these

Nucleus of a hydrogen atom may contain:

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One neutron only

Two protons and one neutron

Two protons and two neutrons

Aany of above

One proton only

When a transistor is used as a switch the circuit in which the current is to be switched OFF and ON, is connected between the

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base and emitter

collector and emitter

base and collector

any one of these

The unit of work function is:

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Joule

Electron volt

That of threshold frequency

Both (A) and (B)

None of these

Crests and troughs are formed in:

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Longitudinal waves

Transverse waves

Both of these

None of these

Deep water almost runs still when surface water flow in rivers. What does it explains

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Magnus effect

Equation of continuity

Surface energy

Bernoulli's equation

The irregular and unsteady flow of the fluid is called

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turbulent flow

steady flow

either of them

both of them

Biomass includes:

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Crop residue

Natural vegetation

Animal dung

All of these

The conduction band in a solid

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may be empty

cannot be empty

should be filed

all of them

Laplace formula is derived from

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Isothermal change

Adiabatic change

Isobaric change

None of these

Average value of A.C voltage during one cycle is

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1

Zero

Maximum

Variable

A pair of quark and antiquark makes a:

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Meson

Baryon

Proton

Neutron

None 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

First law of thermodynamics tells us that heat energy can be converted into equivalent amount of work, but it is silent about

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how heat is absorbed

how heat extracted

how this conversion takes place

none of them

When the temperature of source and sink of a heat engine become equal entropy change will be

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Zero

Max

Min

-ve

A ball is thrown upwards with a velocity of 100 m/s. It will reach the ground after

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10 s

20 s

5 s

40 s

When a position comes close to an electron they annihilate into photons such that

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each photon has energy 0.51 Me v

each photon has energy 1.02 Me v

each photon has energy 0.25 Me v

none of these

10 c.c. each of oxygen and hydrogen are kept in separate flasks. Then which of the following relations is correct?

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Each have same number of molecules

Don't have same number of molecules

Can't be predicted

None

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