Question # 1

The missing mass which is converted to energy in the formation of nucleus, is called

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packing fraction

mass defect

binding energy

none of these

Split rings act as

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Vibrator

Resistor

Motor

Commulator

A rotating body tends to be slower, when its angular acceleration is:

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Positive

Negative

Zero

Infinity

OP-AMP has the following input terminals

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one

two

three

four

The SI unit of capacitance is

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Farad

Henry

Ohm

Volt

Neon gas have three isotopes whose atomic numbers are

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20, 24 , 23

20, 21 , 22

20, 19 , 21

none of these

Substances that do not flow easily have

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large coefficient of viscosity

small coefficient of viscosity

either of them

none of them

The power factor of resonant series circuit is

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1

0

-1

0.5

Work-energy principle states that work done on the body by applied force is equal to change in:

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Potential energy

Kinetic nergy

Linear momentum

None of these

Work has the dimensions as that of

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Torque

Angular momentum

Linear momentum

Power

Two water pipes of diameters 4 cm and 8 cm are connected with a supply line. The velocity of flow of water in the pipe 4 cm diameter is

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1/4 times

4 times

Twice

1/2 of 8 cm diameter pipe

If the line of action of force F passed through the axis of rotation or origin then its torque is

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Maximum

Minimum

Zero

None of these

The Dimensions of volume is

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[V³]^-1

[L^-3]

[L]³

None of these

The changes which involve friction or dissipation of energy are reversible through

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Conduction

Convection

Radiation

All of these

When a mirror of a Michelsion's interferometor is moved a distance of 0.5 mm, 2000 fringes are observed, the wavelength of the light used is

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5000 mm

5000°A

500 cm

2000°A

SI unit of temperature

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Centigrade

Celsius

Kelvin

All of these

Electromagnetic waves transport:

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Energy only

Momentum

Both A and B are correct

None is correct

Rain drops are spherical because of

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Gravitational force

Surface tension

Low viscosity of water

Air resistance

All of the following statements are correct except

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The total focal length of an 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 be increased by decreasing the focal length of the eyepiece.

Viscosity of gases with increase in temperature

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Increase

Decrease

Remains same

None

What will be the colour of the sky as seen from the earth if there were no atmosphere ?

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Black

Blue

Orange

Red

Power loss taken place when a light signal travels along fibres by

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Multiple reflection

Light absorbed due to impurities in glass

At joint some light is scattered by group of atoms

All of these

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