Question # 1

A field in which the work done in moving a body along closed path is zero is called

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Nuclear Field

Conservative field

Gravitational field

Non-conservative field

In stationary waves

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Energy is uniformly distributed

Energy is minimum at nodes and maximum at antinodes

Energy is maximum at nodes and minimum at antidotes

Alternating maximum and minimum energy producing at nodes and antinodes

A flywheel accelerates from rest to an angular velocity of 7 rad/sec in 7 seconds. Its average acceleration will be:

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49 rad/sec²

1 rad/sec²

0.16 rev/sec²

Both A and C

Both B and C

In a semi-conductor material, current flows due to

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positive charge

negative charge

both of them

none of them

The R₁= infinity and R₂= 0, then the gain of non-inverting amplifier is

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zero

infinity

one

any one of these

The voltage increases linearly with

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time

velocity

acceleration

torque

Silicon can be obtained from

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Lead

Uranium

An isotope of oxygen

Sand

The product of induced current and the resistance of the wire through which the current is passing is called:

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Electromagnetic induction

induced emf

Induced current

Self induced

None of these

Significant figures in 0.2020 are:

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Two

Three

Four

Five

One radian is

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Greater than one degree

Less than one degree

Equal to one degree

None of these

A line which represents the direction of travel of a wave is known as:

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Spherical Wavefront

Locus

Ray

Either B or C

nuclear physics deals with

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Atom

Atomic nuclei

Elementary particles

Light

Two projectiles are fired from the same point with the same speed at angles of projection 60° and 30° respectively.Which one of the following is true?

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Their range will be same

Their maximum height will be same

Their landing velocity will be same

their time of flight will be same

In a full wave rectifier with input frequency 50Hz. The frequency of pulsating D)C) received as an output across the load is

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50 Hz

100 Hz

500 Hz

zero

In digital modulation, the LED or laser flashed on and off at a

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Fast rate

Very fast rate

Extremely fast rate

None of these

If 'd' is the total displacement of the body in time 't' then the velocity during this interval t is

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Initial velocity

Variable velocity

Average velocity

None of these

Speed of light in vacuum depends upon:

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Frequency

Wavelength

Amplitude

None of above

The work done is stretching a spring of force constant 20 Nm^-1 by an amount 30 cm is

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0.6 J

0.9 J

1.2 J

1.5 J

The volt is equal to

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C/q

N/m²

Joule/coulomb

Nm²/C

The study of atomic structure of crystals by X-rays was initiated by W.H.. Bragg and W.L. Bragg in

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1920

1926

1910

1914

The viscosity of fluid is described by

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Resistive forces of fluid

Frictional effect between different layers of a fluid

Flowing speed of fluid

None of these

Two row boats moving parallel in the same direction and pulled toward each other due to the application of Bernoulli's equation

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Stake's theorem

Toricelli's theorem

Venturi relation

None of these

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