Question # 1

There is no net transfer of energy by particle of medium in

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Longitudinal wave

Transverse wave

Progressive wave

Stationary wave

According to the special theory of relativity

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mass and energy are same entities

mass and energy are same entities but interconverible

mass and energy are different entities but interconverible

mass and energy are different entities but non-interconveritble

In a surface tension experiment with a capillary tube water rises up to 0.1 m. if the same experiment is repeated on an artificial satellite, which is resolving around the earth, water will rise in the capillary tube up to a height of

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0.1 m

0.2 m

0.98 m

Full length of the capillary tube

Semi-conductor elements have atoms with

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2 valence electrons

3 valence electrons

4 valence electrons

5 valence electrons

The force acting on a charge moving in a magnetic field

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is perpendicular to the both magnetic field and direction of motion

is proportional to the magnetic of charges

vanishes when the motion is directly opposite to the direction of field

all of the above

One radian is equal to:

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30.3°

45.3°

50.3°

57.3°

In thermodynamics, internal energy is the function of

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temperature

pressure

state

none of them

Step up transformer has a transformation ratio of 3:2. What is the voltage in secondary, if voltage in primary is 30V:

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45 V

15 V

90 V

300 V

The SI unit of current is

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watt

coulomb

volt

ampere

If time period of a pendulum is doubled by increasing its length, then its frequency will

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Also be doubled

Become half

Become one fourth

Becomes four times

Magnetic effect at a point caused due to flow a current depend upon the

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Quantity of current

Distance from current

Both the quantity of current and distance from current element

None of the all

Which one is a vector quantity?

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Work

Density

Momentum

Pressure

When we consider the average velocity of a body, then the body is moving in

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straight line

curved line

may be in a straight or curved path

none of them

Slope of velocity time graph gives

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Distance

Instantaneous acceleration

Instantaneous velocity

Instantaneous speed

The word amorphous means:

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Without any structure

With define structure

Regular arrangement of molecules

Both B and C

None of these

Adiabatic change occurs when the gas expands or compresses when contained in an insulated cylinder

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Slowly

Very slowly

Rapidly

None of these

For interference to occur, the light coming from the two slits should

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be monochromatic

come from the same source

have a constant path difference

all of them

The polarized can be achieved by using process like

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Coherent sources

Diffraction

Selective absorption

None of these

Michelesion's interferometer is an instrument usually used to measure

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intensity of light

speed of light

wavelength of light

dispersion of light

A man is an elevator descending with acceleration will conclude his weight has

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Increase

Decrease

Remain constant

Become zero

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

A diesel engine converts heat energy into work by

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35%

40%

35% to 40%

45%

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