Question # 1

If the metal bob is a simple pendulum is replaced by a wooden bob, then its time period will

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Increas

Decreases

Remain the same

First A then B

If tube length of astronomical telescope is 105 cm and magnifying power is 20 for normal setting. Calculate the focal length of objective

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100 cm

10 cm

20 cm

25 cm

The excess (equal in number) of electrons that must be placed on each of two small spheres spaced 3 cm apart, with force of repulsion between the spheres to be 10^-19N, is

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25

225

625

1250

The unit of electric current 'ampere' is the amount of current flowing through each of two parallel wires 1 m apart and of infinite length will give rise to a force between them equal to

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1 N/m

2 x 10^-7N/m

1 x 10^-2N/m

4 x 10²N/m

What is the average energy of N molecules of monoatomic gas?

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1/2 NKT

NKT

3/2 NKT

5/2 NKT

A cable that can support a load W is cut into two equal parts. The maximum load that can be supported by either part is:

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W/4

W/2

W

2W

Two point charges A and B separated by a distance R attract each other with a force of 12 x 10^-3N. The force between A and B when the charges on them are doubled and distance is halved

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1.92 N

19.2 N

12 N

0.192 N

All of the following statements are correct except

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The total focal length of astronomical telescope is the sum of the focal lengths of its two lenses

The image formed by the astronomical telescope is always erect because the effect of the combination of the two lenses is divergent

The magnification of an astronomical telescope can increases by decreasing the focal length of the eyepiece

The magnifying power of the refracting type of astronomical telescope is the ratio of the focal length of the objective to that of the eye piece

At a certain instant a stationary transverse wave is found to have maximum kinetic energy. The appearance of string of that instant is:

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Sinusoidal shape with amplitude A/3

Sinusoidal shape with amplitude A/2

Sinusoidal shape with amplitude A

Straight line

In an A.C. circuit, a resistance of R ohm is connected in series with an inductance L. If phase angle between voltage and current be 45°, the value of inductive reactance will be

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R/4

R/2

R

Cannot be found with the given data

A lens behaves as a converging lens in air and a diverging lens in water. The refractive index of the material is

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Equal to unity

Equal to 1.33

Between unity and 1.33

Greater than 1.33

Which of the following is not thermo dynamical function?

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Enthalpy

Work done

Gibb's energy

Internal energy

The motion without consideration of its cause is studied in

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Kinematics

Mechanics

Statics

Modern Physics

Blood has a density

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Equal to water

Greater then water

Lesser then water

None of these

Which of the following four statement is false?

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A body can have zero velocity and still be accelerated

A body can have a constant velocity and still have a varying speed

A body can have a constant speed and still have a varying velocity

The direction of the velocity of a body can change when its acceleration is constant

The number of translation degrees of freedom for a diatomic gas is

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2

3

5

6

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