Question # 1

If the acceleration of a body is not uniform, then velocity-time graph will be:

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Curve

Straight line

Sphere

All of these

A photon is considered to have

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Momentum

Energy

Wavelength

All of the above

The electric potential at the surface of an atomic nucleus (Z = 50) of radius 9.0 x 10^-15is

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9 x 10⁵V

9 V

8 x 10⁶V

80 V

Which of the following phenomenon proves the particle nature of light

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interference

diffraction

photoelectric effect

none of these

The shortest distance between two points directed from its initial point to final point is called:

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Velocity

Displacement

Speed

Distance

Two metal rods A and B have their initial lengths in the ratio 2 : 3 and coefficients of linear expansion in the ratio 4 : 3. When they are heated through same temperature difference the ratio of their linear expansion is

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1 : 2

2 : 3

3 : 4

8 : 9

At the present time, the main frontiers of fundamental science are

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2

3

4

5

Newton's first law is also called:

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Law of torque

Law of force

Law of inertia

None of these

(CRO) Cathode ray oscilloscope is a device used for high speed

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velocity

graph plotting

time-velocity

none of these

Diameter of the atom is of the order of

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10^-10m

10^-12m

10^-15m

10^-9m

If we draw a graph between d(along x-axis) and F (along y-axis) and get a straight line horizontal to x-axis then area under this straight line represents:

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Power

Work

Pressure

None of these

The discuss used by athletes has a mass of 1 kg, its weight in newtons is

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9.8 N

80 N

98 N

100 N

The power output of a full wave rectifier is:

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Equal to H.W.R

Twice of H.W.R

Half of H.W.R

Four times of H.W.R

To get high resolving power for a telescope one should use

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Objective of large aperture

Objective of large focal length

Eye piece of large focal length

Eye piece of small focal length

In addition and subtraction

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Percentage uncertainties are added

Percentage uncertainties are subtracted

Absolute uncertainties are added

Absolute uncertainties are subtracted

Successive dark and bright fringes are formed each time the moveable mirror in Michelsion's interferometer is moved a distance

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λ/2

λ/4

λ

3/2λ

To find wavelength of light by his experiment. Newton utilized:

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Principle of phase change

Snell's Law

Bragg's law

Both (A) and (C)

A cable breaks if stretched by moe than 2mm, it is cut into two equal parts. How much either [art can be stretched without breaking?

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25 m

1 mm

2 mm

0.5 m

The principle characteristics of an ideal standard are

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Inaccessible and invariable

accessible and invariable

Accessible and variable

None of these

In Bernoulli's equation, the work done due to fluid is

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The path followed by a ballistic missile is called

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parabolic trajectory

ballisitic trajectory

both of them

none of them

When the direction of r and F are reverse

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the direction of torque remain unaltered

the magnitude of torque remain unchanged

both the magnitude and direction of torque remain unchanged

both the magnitude and direction of torque change

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