Question # 1

Potentiometer is more sensitive than voltmeter, because

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Voltmeter has a very high resistance

Voltmeter has a very low resistance

Potentiometer does not draw any current from a source of unknown potential difference

Potentiometer is sensitive

If a material object moves with the speed of light 'C' its mass becomes

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Equal to its rest mass

Four times of its rest mass

Double of its rest mass

Infinite

Which quantity has different dimension?

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Tension

Work

Energy

Torque

If the formula PV = nRT, n denotes:

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Number of molecules per unit volume

Number of moles

Number of molecules

None of these

In bringing an electron towards another electron, electrostatic potential energy of system

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Decreases

Increases

Remains uncharged

Becomes zero

The current produced by moving a loop of wire across a magnetic field is called

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Direct current

Magnetic current

Alternating current

Induced current

None of these

The half life of uranium-238 is

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6.2 x 10⁹years

4.5 x 10⁹days

4.5 x 10⁹years

1.3 x 10⁶years

Radio telescope is used to gather information from

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Earth

Moon only

Far side of the universe

Sea water

Biomass includes:

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Crop residue

Natural vegetation

Animal dung

All of these

For an atom having atomic number Z and atomic weight A, the charge on the nucleus is

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A - Z

A + Z

Z

A

If we draw a graph between d(along x-axis) and F (along y-axis) and get a straight line horizontal to x-axis then area under this straight line represents:

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Power

Work

Pressure

None of these

In the thin film, the path difference of two reflected ray depends upon

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Thickness of the film

Nature of the film

Angle of incidence

All of these

The energy expended when a force of one newton moves an object one meter in the direction of force is called

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1 calorie

1 Joule

1 KWh

1 electron Volt

The temperature of sun is measured with

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Platinum thermometer

Gas thermometer

Vapour pressure thermometer

Pyrometer

The charged nucleus of an atom itself spins, it's magnetic field

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equals the field produced by orbital electrons

greater than the field produced by orbital electrons

much weaker than the field produced by orbital electrons

none of them

The dimensions of ½at²are of

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length

Velocity

Acceleration

TIme

A disc roll down a hill of 10.0 m from rest without slipping. What is its speed at the bottom

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10.2 ms^-1

11.3 ms^-1

11.4 ms^-1

None of these

Bulk modulus for tungsten is

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50

100

150

200

Albert A. Michelson devised interferometer is

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1820

1845

1860

1881

Which device converts the light signals which these amplified and decoded

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Photo cell

Photo diode

Photo transistor

None of these

Which effect provides direct experimental evidence that light is a transverse rather than a longitudinal wave motion?

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Light can be diffracted

Two coherent light waves can be made to interfere.

The intensity of light from a point source falls off inversely as the square of the distance from the source

Light can be polarized

The gravitational force of earth on a ball of mass one kilogram is 9.8 N. The attraction of ball on the earth is

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9.8 N

Negligible

Slightly less than 9.8 N

More than 9.8 N

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