Question # 1

In a three phase a.c generator if the first coil has a phase 0, then the other two coils will have phases

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90° - 120°

20° and 140°

120° and 240°

120° and 140°

The ratio of energy E to the corresponding frequency (f) of the radiation (emitted or absorbed) is called:

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Wien's constant

Stefen's constnat

Planck's constant

Boltzmann's constant

None of these

The material in the form of wire or rod or plate which leads the current into or cut of the electrolyte is known as

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voltmeters

resistance

electrode

current

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

Self inducede e.m.f. is also called

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Motional e.m.f.

Thermistor

Electrostatic induction

Back e.m.f

If a freely oscillating system is subjected to an external force, then

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free vibrations will take place

the body will move with its natural frequency

forced vibrations will take place

none of them

An isochoric process is one which take place at

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Constant internal energy

Constant entropy

Constant volume

Constant pressure

In AND gate, the output is 1 if:

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Both inputs are 0

Both inputs are 1

Only one input is 0

Both (A) and (B)

Both (A) and (C)

The maximum possible error in the reading for a meter rod with least count 1 mm is:

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0.005 mm

0.05mm

0.5mm

5.0mm

Hydrogen and helium of same volume V at same temperature T and same pressure P are mixed to have same volume V. The resulting pressure of the mixtures will be

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R/2

P

2P

Depending on the relative mass of the gases

The unit of resistance is

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volt

ampere

ohm

coat

When the car moves with constant acceleration, the velocity time graph is a

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Straight line

Straight line rises equally

Horizontal straight line

None of these

By calculating the area under the velocity time graph, we can find the

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Acceleration

Velocity

Distance

None of these

Inertial frame of references are those frame of references which are moving with

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increasing velocity

decreasing velocity

constant velocity

all of them

Blood is an/a

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Ideal fluid

Perfect fluid

Compressible fluid

Incompressible fluid

A regular, repetitive, three-dimensional pattern of points, which represent the position of molecules, atoms or ions in the crystal, is called:

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Unit cell

Space lattice

Crystal

None of these

The regular array of atoms in a crystal has spacing of the order of

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10^-16m

10^-14m

10^-10m

10^-6m

The ballistic missiles are useful for

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Short ranges

Long ranges

Medium ranges

None of these

Which of the following quantities has not been expressed in proper units?

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Stress/Strain= Newton/metre²

Surface tension = Newton/metre

Energy = kg m/s

Pressure = newton/metre²

If the temperature difference between hot and cold body is greater the heat engine is:

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Not efficient

Less efficient

More efficient

NOne of above

The principle of Michelson's interferometers is

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Refraction

Dispersion

Interference

Reflection

Three students measured the length of needle with a meter rod Which of the following is correct measurement

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0.2145 m

0.21 m

0.2142 m

None

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