Question # 1

The highest value reached by the voltage or current:

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In quarter cycle is called Instantaneous value

In half cycle is called peak-to-peak value

In one cycle is called peak value

In half cycle is called Instantaneous value

None of these

A conducting wire is drawn to double its length. Final resistivity of the material will be

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Double of the original one

Half of the original one

One fourth of the original one

Same as original one

Associated with the motion of a driven harmonic oscillator, there is a very striking phenomenon, know as

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waves

beat

interference

resonance

The positive charge moving in one direction is equivalent in all external affects to a:

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Negative charge is moving in the same direction

Positive charge is moving in the opposite direction

Negative charge moving in the opposite direction

Positive charges moving in the same direction

None of these

The dimensions of work

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[MLT^-1]

[MLT^-2]

[ML²T^-2]

[MLT]

The information from far side of the universe are gathered by:

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Radio telescope

Microscope

Telescope

Spectro scope

The coefficient of linear expansion of iron is 0.000011 per°K. An iron rod is 10 metre long at 27°C. The length of the rod will be decreased by 1.1 mm when the temperature of the rod changes to

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0°C

10°C

17°C

20°C

When an electron enters in a magnetic field right angle to its motion, the magnitude of its velocity will be

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changed

zero

unchanged

none of these

When a suitable small resistance is put in parallel with the galvanometer coil, it is converted into

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Voltmeter

Avometer

Ammeter

None of these

Angular frequency 'w' is basically a characteristics of

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linear motion

circular motion

both of them

none of them

In transverse waves, the individual particles of the medium move:

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In circles

Perpendicular to the direction of level

Parallel to the direction of level

None of these

The value of g at the surface of moon is

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1.8 ms^-2

1.6 ms^-2

1.9 ms^-2

0.16 ms^-2

Time of flight of a body in projectile is the time in which a body

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Remains in the air

It reaches maximum height

The velocity becomes zero

None of these

A force of 10 N displace an object by 10 m.If work done is 50 J then direction of force makes an angle with direction of displacement.

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120°

90°

60°

None of these

Two masses of 1 g and 4 g are moving with equal kinetic energies.The ratio of the magnitudes of their linear momenta is:

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4 : 1

√2 : 1

1 : 2

1 : 16

Which part of the spectrum is most visible?

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Red

Violet

Yellow

Yellow-green

If stress is increased beyond the elastic limit a permanent change in the material is observed This behavior is called

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Elastic deformation

Elasticity

Plasticity

Yield strength

The blood pressure inside is greater than the

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External atmospheric pressure

Internal atmospheric pressure

Both of them

None of these

The temperature below which materials are superconductor is called as:

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Kelvin temperature

Critical temperature

Curie temperature

none of these

A convex ens acts as diverging lens when the object is placed

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Between F and 2F

At 2F

Within the focal length

Beyond 2F

Monochromatic light means waves of:

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Same frequency

Same colour

Same wavelength

All of them

If the direction of r and F are reversed, then

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The magnitude of the torque changes but direction remains unchanged

The magnitude of the torque does not change but direction reverses

The magnitude and direction of the torque change

The magnitude and direction of the torque remain unchanged

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