Question # 1

A field in which the work done in moving a body along closed path is zero is called

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Nuclear Field

Conservative field

Gravitational field

Non-conservative field

The magnetism produced by electrons within an atom can arise from

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electrons orbiting the nucleus

electrons posses a spin

both motions

none of these motions

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

What temperature is the same on Celsius scale as well as on Fahrenheit scale?

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32°C

-32°C

-40°C

-212°C

If the object is placed at 12 cm distance from a convex lens of focal length 6 cm, then we get an image of ____ as that of object:

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Double the size

Same size

Half the size

None of these

The valence band of an atom in a solid

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is always empty

may or may not be empty

can never be empty

none of them

Which of the following type of force can do no work on the particle on which it acts:

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Frictional force

Gravitational force

Electric force

Centripetal force

In the compton's effect, it is found that the wavelength of incident x-rays is

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greater than the wavelength of scattered x-rays

equal to the wavelength of scattered x-rays

less than the wavelength of scattered x-rays

any one of these

A cold soft drink is kept on the balance. When the cap is opened, then the weight

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Increases

Decreases

First increases, then decreases

Remains same

If we connected the ordinary DC ammeter to measure alternating current, it would measure its:

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Instantaneous value

RMS value

Value averaged over a cycle

Either (B) or (C)

Either (A) or (C)

Work is a:

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Scalar quantity

Vector quantity

Base quantity

None of these

Tick the one which is not polymer solid:

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Zirconia

Polythene

Nylon

Synthetic rubber

None of these

In the stress-strain graph, stress is increased linearly with strain until a point is reached, this point is known as

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plastic limit

plastic deformation

proportional limit

elastic behaviour

During the free fall motion of an object, when its weight becomes equal to the drag force, then it will move with

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maximum speed

zero speed

maximum speed

none of them

When the surfaces are coated with a lubricant, then they

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Stick to each other

Slide upon each other

Roll upon each other

None of these

When angular acceleration is positive, the body rotates:

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Slower

Slowest

Faster

None of these

Which of the following is/are example/s if mechanical waves i.e. waves generated in _______:

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Rope

Coil of spring

Water

All of them

The discuss used by athlete has a mass of 1 kg, its weight in newton is

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9.8 N

80 N

98 N

100 N

If A represents linear momentum and c, the velocity of light, then unit of pc in international system of units is:

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Newton

Joule

Joule-Sec

Joule-s^-1

Watt

The magnetic field in the middle of a solenoid due to current is

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weak

strong and uniform

none-uniform

zero

The unit of decay constant is:

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Second

Metre

Hour

Year

Second^-1

When two objects come to common temperature, the body is said to be in:

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Static equilibrium

Dynamic equilibrium

Thermal equilibrium

None of these

Which one of the following relations is correct?

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1 Wb-m²= Nm^-1A^-1

1 tesla = 104 gausses

1 Wb-m²= 1 tesla

All of the above

It two waves of amplitude 'a' produce a resultant wave of amplitude a, then the phase difference between them will be

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60°

90°

120°

180°

In a transistor, if the central region is p-type then this type of transistor is known as

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p-n-p transistor

n-p-n transistor

either of these

none of these

When the temperature of source and sink of a heat engine become equal entropy change will be

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Zero

Max

Min

-ve

The artillery shells travel along parabolic paths under the influence of

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magnetic field

electric field

electromagnetic field

gravitational field

Which of the following can become a good temporarily magnet

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iron

steel

both of them

none of them

The ratio of the diameter of two convex lenses is _____-the ratio of their focal lengths:

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Greater than

Less than

Equal to

None of these

Xerography means:

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Dry writing

Wet writing

Poor writing

Excellent writing

Both (A) and (B)

An electric charge at rest is

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Only an electric field

Only a magnetic field

Both electric and magnetic fields

None of the above

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