Question # 1

Which one of the following physical quantities changes with relativistic speed

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Length

Mass

Time

All of the above

The working of all DC electric meters (galvanometers, ammetersand voltmeters) depends upon

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Heating effect of current

Chemical effect of current

Magnetic effect of current

Electromagnetic effect of current

Silicon can be obtained from

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Lead

Uranium

An isotope of oxygen

Sand

Gamma rays consist of steam of

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electron

proton

photons

all of these

In a capacitive circuit

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Current leads voltage by phase ofπ/2

Voltage leads current by phase ofπ/2

Current and voltage are in same phase

Sometime current and sometime voltage leads

Suppose the water flows out from a pipe at 3kg s^-1and its velocity changes from 5m s^-1to zero on striking the wall, then the force exerted by water on wall will be

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5 N

10 N

15 N

20 N

The number of vibrations in two seconds can be expressed as______if frequency of vibration is f.

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f

2 f

3 f

1/2 f

In a cubic crystal, All solids meet at:

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60^o

90^o

109^o

30^o

10^o

Which of the following is scalar quantity?

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Electric potential

Velocity

Momentum

Force

One radian is

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Greater than one degree

Less than one degree

Equal to one degree

None of these

Fire fighters have a jet attached to the head of their water pipes in order to head of their water pipes in order to

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Increase the mass of water flowing per second

Avoid wastage of water

Increase the velocity of water flowing out

Increase the volume of water flowing per second

The unit of work function is

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eV

Volt

Farad

Herdz

Two circular rings have their masses in the ratio 1 : 2 and diameter in ratio 2 : 1 the ratio of their moment of inertia is

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1:4

4:1

2:1

√2:1

For a fixed force, larger is the mass of a body

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Greater acceleration

Small acceleration

Same acceleration

None of these

For a fixed force, larger is the mass of a body

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Greater acceleration

Small acceleration

Same acceleration

None of these

The dimensions of the quantities in one of the following pairs are the same.identify the pairs.

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Torque and work

Angular momentum and work

Energy and Young's modulus

Light year and time

One fixed point of temperature used in the absolute scale is

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0°C

273 K

273.16 K

0K

Crystalline solids are also

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Metals

Ionic compound

Ceramics

All of them

The velocity of a body at some particular instant is called

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Initial velocity

Instantaneous velocity

Variable velocity

None of these

The magnitude of velocity at any instant is

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Davisson and Germer, in their experiment used:

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Nickle crystal

Lead crystal

Graphite crystal

Glass

Capacitor can be charged by transferring

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Negative charge

Positive charge

Both

None them

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