Question # 1

Generally a temperature scale is established by using certain physical properties of a material which varies

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nonlinearly with temperature

linearly with temperature

either of them

none of them

When a mass attached to a spring begins to move left or right from the equilibrium position, its P.E.:

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Increases

Decreases

Remains constant

None of these

A 60 W bulb operates on 220 V supply. The current flowing through the bulb is

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11/3 A

3 A

3/11 A

6

To sources are said to be coherent if they have:

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Same amplitude

Same wavelength

Definite phase relation with each other

None of them

Wave length of light, on the average, is given by:

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10^-14_m

10^-10_m

10^-6_m

10^-4_m

Amorphous solids are also called as

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crystalline solids

polymeric solids

glassy solids

any one of them

Computer chips are made from:

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Iron

Silicon

Helium

Stontium

Aluminium

When the upward drag force of the fluid becomes equal to downward force of gravity of the droplet, then its velocity:

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Starts increasing

Starts decreasing

Becomes constant

Is called escape velocity

In a normally biased n-p-n transistor, an electron c current I_Eflows from the

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emitter into the base

collector into the base

base into collector

none of these

Charge on proton is

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1.59 x 10^-9C

1.59 x 10^-7C

-1.59 x 10^-19C

1.59 x 10^-19C

If a freely oscillating system is subjected to an external force, then

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free vibrations will take place

the body will move with its natural frequency

forced vibrations will take place

none of them

The component of a vector has its direction as

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Same

Opposite

perpendicular

None of these

A fixed mass of a gas is at a pressure P. if its volume and absolute temperature are both doubled, the new pressure is

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P/4

P/2

P

2P

A 1500 kg car has its velocity reduced from 20 ms^-1 to 15 ms^-1 in 3.0 S. How large was the average retarding force

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- 4.5 KN

- 2.5 KN

- 3.7 KN

- 4.3 KN

The magnitudes of vectors A.B and C are 3,4 and 5 units respectively.If A + B = C the angle between A and B is:

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π/2

cos^-1 0.6

tan^-1 7/5

π/4

In an adiabatic process

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Temperature remains constant

No change of internal energy

Volume remains constant

No heat enters or leaves the system

Einsteins theory gives us a physical picture of how gravity

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Created

Produced

Works

None of these

Bulk modulus is involved when the deformation is

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One dimensional

Two dimensional

Three dimensional

All of these

The eye piece of a compound microscope acts as a

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Diverging lens

Converging lens

Diverging mirror

Converging mirror

Correction factor can be applied to

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Personal error

Systematic error

Random error

All

If we go from the equator to a pole, the value of g

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Increases

Decreases

Remains unchanged

First increase and then decrease

Bulk modulus for tungsten is

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50

100

150

200

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