Question # 1

Magnetic induction is also called as:

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Ampere’s law

Faraday’s law

Lenz’s law

Newton’s law

Coulomb’s law

The time interval during which the Voltage source changes its polarity once is known as:

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Time period T

Half the time period

Quarter the time period

Two third of the time period

None of these

The number of "Earth stations" which transmit signals to satellites and receive signals from them are:

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3

24

126

200

Capacitance of two or more capacitors

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Increases in series combination

Increases in parallel combination

Remains unchanged

None of the above

The doped semi-conductor materials are known as

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intrinsic semi-conductor

extrinsic semi-conductor

either of them

none of them

A body can have constant velocity when it follows:

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A circular path

A rectilinear path

Trajectory of a projectile

None of these

When the pn-junction is connected reversed biased, its resistance is of the order of

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few ohms

few kilo-ohms

few mega-ohms

few mili-ohms

The transition from solid state to liquid state is:

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Abrupt

Slow

Continous

Discontinous

Both (A) and (D)

The locus of all the points in the same phase of vibration is called:

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Wave packet

Wave front

Wave number

None of them

The capacitance of a parallel plate capacitor depends upon

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Area of the plates

Separation between the plates

Medium between the plates

All of the above

In the expression of force experienced by electron, the direction of both v and B are

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parallel

zero

perpendicular

none of them

A signal is amplified at the output without any change of phase, if it is applied at the

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inverting input

non-inverting input

at any of the input

none of these

Above a certain velocity of a fluid is called

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turbulent flow

steady flow

either of them

both of them

An isochoric process is one which take place at

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Constant internal energy

Constant entropy

Constant volume

Constant pressure

The speed of sound in a medium depends on

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The elastic property but not on the inertia property

The inertia property but not on the elastic property

The elastic property as well as the inertia property

Neither the elastic property nor the inertia property

The circuit which is used to smooth the output voltage of the full-wave rectification is known as

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transformer

rectifier

filter

none of these

Conversion of chemical energy to electrical energy can be achieved by:

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Primary cell

Secondary cell

Both (A) and (B)

Photovoltaic cell

Solar cell

The distance covered by a body in unit time is called.

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Displacement

speed

Velocity

Both B and C

Under the elastic region, the deformation produced in the material, the deformation produced in the material will be

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permanent

temporary

either of them

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

When quarter of a cycle is completed, the phase of vibration is:

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90°

180°

45°

360°

Glass and high carbon steel are the examples of

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brittle substances

ductile substances

plastic substances

elastic substances

The bob of a simple pendulum is suspended by

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string

heavy inextensible string

light extensible string

light inextensible string

The current that flows through the coil of a motor causes

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Its shaft to revolve

Its brushes to rotate

Motor to move

Its shaft to rotate

None of these

The concept of direction and position are purely

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absolute

relative

absolute or relative

none of these

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

Which quantity has different dimension:

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Work

Pressure

Energy

Torque

A 100 kg car is moving at a speed of 10 m/sec and comes to rest after covering a distance of 50 m. the amount of work done against friction is:

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+5 x 10¹J

+5 x 10²J

+5 x 10³J

+5 x 10⁴J

A weakly damped system has fairly

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sharp resonance curve

flat resonance curve

both of them

none of them

Which one is not produced by sound waves in air?

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Polarization

Diffraction

Refraction

Reflection

Which force is not a conservative force?

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Frictional force

Gravitational force

Electric force

Elastic spring force

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