Question # 1

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

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p-n-p transistor

n-p-n transistor

either of these

none of these

A galvanometer is an instrument used to

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measure voltage across a circuit

detect current in a circuit

measure current flowing through a circuit

none of these

If the mass of the simple pendulum becomes double, its time period

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increase

decreases

remains constant

none of them

In an adiabatic process the work is done at the expense of the

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energy supplied to the system

energy gained from the surroundings

internal energy

none of them

In RC series circuit the time during which the capacitor acquires 0.63 times the equilibrium charge is called

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Time constant

Decay constant

None of these

All of above

Units of impedance are

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Henry

Ohms

moh

Watt

Experiments revealed that the ratio of the stress to the strain is a constant value for

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different material

all materials

a given material

all of them

An electron of charge e coulomb passes through a potential difference of V volts its energy in joules will be

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V/e

eV

e/V

V

Scalar product is also called:

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Cross product

Dot product

Product scalar

Product vector

Bernoulli's equation is based upon law of conversation

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Mass

Momentum

Energy

None of these

Referring to above figure, current in the coil P grows from zero to its maximum value

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At the instant the switch is closed

At the instant the switch is opened

When switch is kept open

All of above

Neither of above

While applying Guass's Law assuming that the field is

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In different directions

Constant in direction

In all directions

None of these

If a molecule with momentum mv strikes a wall and rebound then the change in momentum will be:

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-2 mv

Zero

2 mv

mv

Dimension of momentum is

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ML^-1T

M^-1LT

MLT

MLT^-1

Zero error of the instrument is a type of _____

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Random error

Personal error

Systematic error

Classified error

Substances which undergo plastic deformation until they break, are known as

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brittle substances

ductile substances

plastic substances

neither of them

The energy dissipated per cycle for iron in hysteresis loop is

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less than for steel

equal to the steel

more than the steel

any one of them

The percentage errors in the measurement of mass and speed are 3% and 4% respectively.The maximum error in the measurement of kinetic energy is:

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11%

10%

8%

9%

Blood is an incompressible fluid having density nearly equal to

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Milk

Honey

Water

None of these

A fiber of 50μm diameter capable of carrying white light at ______ distances is called ______ index fiber

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Large, multi-mode step

Small, multi-mode step

Small, multi-mode graded

Large, single mode step

Steel is more elastic than rubber because

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It is a metal

Its density is higher

Ratio of stress to strain is more

Ratio of stress to strain is less

The axis of ration of an object will not change its orientation unless

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Internal torque acts

Internal torque acts in one direction

External torque acts

None of these

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