Question # 1

If a charged spherical conductor of radius 10 cm has potential V at a point distance 5 cm from its centre, then the potential at a point distance 15 cm from the centre will be

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1/3 V

2/3 V

3/2 V

3V

Rice takes longest to cook

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In a submarine 100 m below the surface of the sea

At sea level

At Murree

At Mount Everest

Example of progressive wave is

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transverse waves

longitudinal waves

both of them

none of them

Selenium is:

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An insulator

A conductor

Insulator in the dark and becomes conductor when exposed to light

Conductor in the dark only

None of these

If a given spring of spring constant k is cut into two indentical segments, the spring constant of each segment is:

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k/2

2 k

4 k

None of these

de-Broglies hypthesis was experimentally verified by

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Maxwell

Compton

Einstein

Davison and Germer

The unit of thermodynamical scale is

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centigrade

fahrenheit

kelvin

none of them

We cannot utilize the heat contents of oceans and atmosphere because

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there is no reservoir at the same temperature

there is no reservoir at the temperature lower than any one of two

there is no reservoir at the temperature higher than any one of two

none of them

The temperature scale approved in SI units is:

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Celsius scale

Kelvin scale

Fehrenheit scale

None of these

When the speed of a body in a fluid increases then the drag force

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decreases

becomes zero

increases

non of them

Inverter is the name given to:

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NOT gate

OR gate

NOR gate

AND gate

XOR gate

A medium of dielectric constant 'K' is introduced between the plates of parallel plate condenser,As a result its capacitance

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Increase k time

Decrease k times

Decreases 1/k times

Remains unchanged

A component of a vector has its

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Normal value

Effective value

Given direction

b and c

The motion in a plane is the motion in

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one dimensions

two dimensional

three dimensional

all of them

The bottom of a container filled with liquid appear slightly raised because of

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Refraction

Interference

Diffraction

Reflection

A person is sitting in a traveling train and facing the engine.He tosses up a coin and the coin falls behind him.It can be concluded that the train is

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Moving forward and gaining speed

Moving forward forward and losing speed

Moving forward with uniform

Moving backward with uniform speed

The electrons in the outermost shell of an atom are called

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Valence electrons

Tightly bound electrons

Free electrons

None of these

Torque will be zero if

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body is at rest

rotating with uniform angular velocity

zero angular acceleration

all of them

In metallic crystals which of the following thing remains constant?

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amplitude of oscillations

temperature of solid

average atomic positions

all of them

No practical heat engine can be pergectly

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Ideal

Reversible

Irreversible

None of these

Which of the following have the same unit:

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Stress

Strain

Modulus elasticty

Both (A) and (C)

Both (A) and (B)

What will be the duration of the day and night (in hour) if the diameter of the earth is suddenly reduced to half its original value the mass remaining constant?

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12

6

3

2

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