Question # 1

The solids which has structure in-between order and disorder are called

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amorphous solids

polymeric solids

crystalline solids

all of them

10⁶electrons are moving through a wire per second, the current developed is

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1.6 x 10^-19

1 A

1.6 x 10^-15A

10⁶A

One KWh is equal to:

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3.6 x 10²J

3.6 KJ

3.6 x 10¹KJ

3.6 MJ

From the theory of relativity, momentum p of the photon is related to energy as

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p = hfc

p = hf/c

p = f(hc,f)

p = cf/h

If the velocity of the body decreases non-uniformly then the slope of the velocity-time graph will have

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different values

same values

zero valves

constant valves

Since the absolute scale is independent of the property of the working substance, hence, can be applied at

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very high temperature

very low temperature

any one of them

none of them

The waves which propagate out in space due to oscillation of electric and magnetic fields are known as

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e.m. waves

mechanical waves

sound waves

water waves

The ultimate source of money sources of energy is:

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Sun

Air

Water

Petroleum

A point on the rim of a wheel moves 0.2 m where the wheel turns through an angle is 14.3 degrees. The radius of the wheel is:

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0.05 m

0.08 m

0.8 m

0.008 m

When certain nucleus emits aβ-particles, is mass number:

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Remain same

Increases by one

Decreases by one

Decreases by four

None of these

The ratio of the size of the image to that of object is called:

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Focal length

Aperture

Linear magnification

Principal axis

A 1500 kg car has its velocity reduced from 20 ms^-1to 15ms^-1in 3.0 S. How large was the average retarding force

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-4.5 KN

-2.5 KN

-3.7 KN

-4.3 KN

The energy need to magnetize and demagnetize the specimen during the each cycle of magnetizing current is

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Value of current

Value of demagnetizing current

Value of magnetic flux density

Area of the loop

For maximum horizontal range, the angle of projection must be:

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0°

45°

60°

90°

The horizontal component of a force at an angle 60° with it is 50N. The value of force is

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43.3 N

50 N

100 N

120 N

In which of the following, Doppler’s effect is not applicable?

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To find speed of satellite

To find objects under water

To find speed of star

To tune a musical instrument

One mole of (NH₄)₂HOP_{4 contains _ moles of hydrogen atoms:}

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1

5

6

9

On heating, glass gradually softens into a paste-like state before it becomes a very viscous liquid at almost

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600°C

7600°C

800°C

900°C

In full wave rectification, the output D.C. voltage across the load is obtainedfor

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The positive half cycle of input A.C. (C) The complete cycle of input A.C.

The negative half cycle of input A.C.

The complete cycle of

All of the above

The fringe spacing in case of red light

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Increases

Decreases

Remains the same

None of these

The Bernoulli's equation is based on the

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Law of conservation of energy

Law of conservation of mass

Law of conservation of momentum

None of these

The unit of product RC is

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volt

Resistance

Second

Coulomb

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