Question # 1

For the conversion of galvanometer into voltmeter, we connect a

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small resistance in series with galvanometer

small resistance in parallel with galvanometer

high resistance in parallel with galvanometer

high resistance series with galvanometer

The second law of thermodynamics is concerned with the circumstances in which

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heat can be converted into work

direction of flow of heat

none of them

both of them

Electron volt is the unit of

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Potential difference

Energy

Resistance

Capacitance

A dirty carpet is to be cleaned by heating. This is in according with______law of motion.

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First

Second

Third

None of these

A typical four stroke petrol engine undergoes how many successive processes in each cycle

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one

two

three

four

The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains

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3 more neutrons

3 more electrons

3 more protons

3 more ions

Centripetal acceleration is also called _______ acceleration:

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Tangential

Radial

Angular

None of them

Electron is a particle whose mass is:

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Greater than that of a proton

Smaller than of a proton and greater than mass of neutron

Smaller than that of proton or neutron

Greater than that of an atom

The current that flows through the coil of a motor causes

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Its shaft to revolve

Its brushes to rotate

Motor to move

Its shaft to rotate

None of these

The resistance of an incandescent lamp is

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Smaller when switched on

Greater when switched off

The same whether it is switch off or switch on

Greater when switched on

The range of projectile is 50 m whenθ is inclined with horizontal at 15°. What is the range whenθ becomes 45°?

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400 m

300 m

200 m

100 m

Propagation of light in an optical fibre requires that the light should

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be partially confined within the fibre

be totally confined within the fibre

not be confined within the table

none of them

When the length and area of cross-section both are doubled, then its resistance:

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Will become half

Will remain the same

Will be doubled

Will become four times

If the earth suddenly shrinks to half of its present radius the acceleration due to gravity will be

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g/2

4g

g/4

2g

When two lights waves travelling in the same direction are in phase at any point, they producing

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constructive interference

destructive interference

dispersion

polarization

The difference between 1st ring fringe and 1st dark fringe is measured as

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λD/2d

λD/d

λD/4d

2λD/d

Which of the following substances possesses the highest elasticity?

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Al

Copper

Steel

Rubber

Newton's rings are formed as a result of

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diffraction of light

dispersion of light

interference of light

polarization of light

Paramagnetic substances are those in which

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Spin and orbital motions are supported

Spin and orbital motions are opposed

Spin and orbital motions supported a little

None of these

Mathematically the instantaneous velocity is defined as

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Flow rate has SI unit

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m²/s

m/s

m³/s

m³/s²

The identity of an element is determined by:

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the number of its protons

the number of its electrons

the number of its neutrons

its atomic mass

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