Question # 1

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

γ-rays are

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electrostatic waves

electromagnetic waves

heavy particles

longitudinal waves

Generally a temperature scale is established by

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one fixed point

two fixed point

three fixed point

four fixed point

A typical rocket ejects the burnt gases at speeds over

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400 ms^-1

40000m s^-1

40000 ms^-1

60000 ms^-1

In above figures, tell which set of graphs shows that a body is moving with uniform velocity:

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(i) and (ii)

(ii) and (iii)

(iii) and (iv)

A curie represents a very strong source of

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α-particle

β-particle

γ-particle

none of these

If the flow is incompressible and the flow is steady then the mass of the fluid through the pipe

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increases

decreases

becomes zero

is conserved

If the radius of first orbit of hydrogen atom is 0.53° A the radius of second orbit will be

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2.120°A

0.212°A

21.2°A

0.14°

a

The motion of a projectile is

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one dimension

two dimension

three dimension

all of them

Such an inductor coil which does not consume energy and is often employed for controlling a.c. without consumption of energy is called

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Choke

impedance

Semi-conductor

None

Magnetic flux passing through a element whose vector area makes an angle0º with lines of magnetic force is:

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BACosѲ

Zero

BA

BA sinѲ

None of these

Experimental demonstration of wave nature of light was given in 1801 by:

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Newton

Maxwell

Thomas young

Compton

If a gymnast sitting on a rotating table with his arms out stretched suddenly lowers his hands

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The angular velocity decreases

The moment of inertia decreases

The angular velocity remains constant

The angular momentum increases

The spacing between lines of diffraction grating is

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Opaque

Transparent

Semi-transparent

None of these

A steam turbine plant has boiler 427 C° and exhausts at 77°C what is the maximum possible efficiency

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60%

70%

50%

40%

Which of the following properties show light is transverse wave in nature?

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Interference

Reflection

Diffraction

Polarization

The approximate efficiency of Nuclear reactor

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33%

32%

39%

45%

You are traveling in a car during a thunder storm. In order to protect yourself from lightning you would prefer to

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Remain in car

Take shelter under tree

Get on and lie flat on the ground

Touch the nearest electric pole

The results of mechanical tests are usually expressed in terms of:

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Stress

Applied force

Strain

Deformation

All of these

The SI units of momentum is

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Kg m s^-2

Kg ms

Kg m s²

Ns

The energy associated with an electron of velocity 10⁶ m/s is:

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4.5 x 10^-10 J

4.5 x 10^-19 J

3 x 10^-10 J

3 x 10^-19 J

A test charge q is the charge which is

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Very small

Very strong

A point charge

All of them

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