Question # 1

Smaller the damping, greater will be the

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frequency

wavelength

amplitude

none of them

The induced current in the loop can be increased by:

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Using a strong magnetic field

Moving the loop faster

Replacing the loop by a coil of many turns

All of above

None of these

In the equilibrium state, the potential difference between two ends of the conductor moving across a magnetic field is called:

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Motion emf

Electrostatic emf

Induced emf

Both A and B

Both A and C

The principle characteristics of an ideal standard are

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Inaccessible and Invariable

Accessible and Invariable

Accessible and Variable

None of these

The number of different crystals systems based on the geometrical arrangement of their atoms and the resultant geometrical structure are

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5

7

9

14

When force and displacement are perpendicular to each other than work is equal to

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Unity

Infinity

Zero

-Fd

The circuit in which current and voltage are in phase, the power factor is

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zero

1

negative

0.83

Amplitude is the displacement of the vibrating body from:

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One extreme position to the other extreme position

Mean position any one extreme position

Both A and B are correct

None of these

There are some whose resistivity becomes zero below a certain temperature, called

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absolute zero

0°C

critical temperature

lower fixed point

transverse wave motion is possible in:

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Air

A mixture of NH₃and O₂

Strings

All of these

If every particle of the flow that passes a particular point, moves along the same path as followed by particles which passed the point earlier, then this flow is said to be

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turbulent

streamline

abrupt

none of them

When a conductoris moved across a magnetic field:

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Emf induced its similar to that of a battery

Emf induced gives rise to induced current

An emf is induced across its ends

All are correct

None of these

Which one of the following elasticizes is possessed by fluids:

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Young's elastic modulus (length)

Bulk elastic modulus (volume)

Modulus of rigidity (shape)

None of these

A body of weight 1 N has a kinetic energy of 1 joule when its speed is:

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1.46 m sec^-1

2.44 m sec^-1

3.42 m sec^-1

4.43 m sec^-1

The rate change of area expressed is expressed in:

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m²s^-1

ms^-2

m²s^-2

ms^-1

None of these

An object moving through a fluid experiences a retarding force called a

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frictional force

terminal force

opposing force

drag force

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

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+5 X 10¹J

+5 X 10²J

+5 X 10³J

+5 X 10⁴J

In the resonance condition, the amplitude of the oscillator becomes

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very large

very small

zero

any one of them

Amplitude in SHM is equivalent to_____ in circular motion:

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Diameter

Radius

Circumference

None of these

The mass of the nucleus is always less than the total man of the protons and neutron that make up the nucleus. The difference of the two masses is called

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nuclear fission

nuclear fusion

man defect

radioactivity

The terms phase difference and path difference are:

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Same

Different

Equal

None of these

the symbol to be used in relativity problems denotes:

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Dilated time

Proper time

Life time

Half time

None of these

If N is the total number of molecules and V is the volume of the container, then the expression for the pressure of gas is

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P=P/V<1/2mv²>

P=2N/V<1/2mv²>

P=2/3N/V<1/2mv²>

P=2/3N/V<mv²>

The direction of induced current is always so as to oppose the cause which produces it. This is

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Lenz's law

Ampere's law

Faraday's law

Coulomb's law

None of these

Structure of the nucleus was explained by

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J.J Thomson

Bohr

Millikan

Rutherford

The device in which induced emf is statically induced emf is:

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Transformer

AC generator

Alternator

Dynamo

Electromagnetic radiation or photons interact with matter in

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two distinct ways

three distinct ways

four distinct ways

five distinct ways

Beta particles are

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hydrogen nuclei

helium nuclei

electrons

photons

From sand, we get a material used for construction of computer chips. That material is called:

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Germanium

Silicon

Copper

Lead

A particle is moving along a circular path with uniform speed. Its projection will execute ___along the _____ of the circle:

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Circular motion, circumference

Vibratory, chord

SHM, diameter

SHM, circumference

The impedance of RLC series resonance circuit at resonant frequency is

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Greater than R

Equal to R

Less than R

None of these

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