Question # 1

A choke coil is used as a resistance in

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d.c. circuit

a.c. circuit

d.c. potentiometer circuit

wheatstone bridge

In a three phase a.c. generator, there are

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2 coils

3 coils

1 coild

No coil

Velocity of a body changes if

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direction of the body changes

speed of the body changes

neither speed nor direction changes

either speed or direction changes

The damping depends upon the

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amplitude

sharpness

both of them

none of them

Which of the following options states the names of fluids in the order of increasing viscosity?

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mercury, motor oil, methanol

methanol, mercury, motor oil

motor oil, mercury, methanol

methanol, motor oil, mercury

The work done by the system on its environment is considered as

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positive

negative

zero

any one of them

One radian is:

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Greater than one degree

Less than one degree

Equal to degree

none of these

Rocket engines lift a rocket from the earth surface, because hot gas with high velocity

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Push against the air

React against the rocket and push it up

Heat up the air which lifts the rocket

Push against the earth

The energy stored in a charge capacitor

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1/2CV²

1/2C²V

1/2C/V²

None of these

When either L or C is increased, the resonant frequency of the RLC series circuit

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Increases

Decreases

Remains the same

Becomes zero

Which of the following substances has got positive temperature coefficient of resistance?

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Carbon

Germanium

Silicon

Aluminium

None of these

The torque acting on a body is the rotational analogue of

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Mass of the body

Linear kinetic energy of the body

Linear velocity of the body

Force in linear motion

The magnitude of torque is equal to the product of the force and the moment arm. The moment arm is

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The distance between the point and the point of the action of the force

The maximum distance between the pint and the line of action of the force

The minimum distance between the pivot point and the line of action of the force

All of these

A collision is said to be elastic during this collision

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K.E of the system remains conserved

momentum of the system remains conserved

total energy of the system remains conserved

all of them

In light waves, the components of electric and magnetic fields are

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parallel to each other

anti-parallel to each

right angle to each other

none of them

When two objects come to common temperature, the body is said to be in:

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Static equilibrium

Dynamic equilibrium

Thermal equilibrium

None of these

The valence band of an atom in a solid

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is always empty

may or may not be empty

can never be empty

none of them

For assessment of total uncertainty when added or subtracted the absolute uncertainties are

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Multiplied

Divided

Added

Subtracted

In full wave rectification, the output DC voltage across the load is obtained for.

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The positive half cycle of input AC only

The negative half cycle of input AC

The completes cycle of input AC only

All of the above

The typical example/examples of optically active crystals

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Quartz

Crystals of sodium chlorate

Crystals of sodium chloride

a and b

the ratio of mean K.E of chlorine and oxygen molecules at same temperature is

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16 35.5

35.5 16

(35.2)²16

1 1

A valance band in solids is

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Always completely filled

Empty

Either completely or partially filled

None

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