Question # 1

Larger number of slots are made in radiators to increase:

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Surface temperature

Surface area

Both A and B

Nonr

The number 275.00 consists of significant figures.

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4

3

2

5

Which process produced cooling effect?

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boiling

freezing

condensation

evaporation

Meniscus of which liquid curves upward.

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Water

Honey

Mercury

Milk

The unit of Heat is:

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Kelvin

Joule

Jkg^-1 K^-1

kg

If the mass of body is doubled while keeping the force contant, then acceleration will be:

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Doubled

One half

4 times

One fourth

Significant figures in 0.0010 are.

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One

Two

Three

Four

Which gas is replaced by Ammonia in refrigerators?

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Nitrogen

Carbon di oxide

Methane

Freon gas

From following, which one is a renewable source of energy?

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Coal

Gas

Sunlight

Petrolum

The radius R of Earth is

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6.4 x 106 m

6.4 x 108 m

6.4 x 1010 m

6.4 x 1012 m

The example of bad conductor is:

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Wool

Copper

Gold

Iron

Watt is equal to:

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Coulomb per second

Newton per second

Volt per second

Joule per second

What happens to the intensity or the brightness of the lamps connected in series as more and more lamps are added:

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Increases

Decreases

Remains the same

Cannot be predicted

Optical fibers work on the principle of:

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Refraction

Reflection

Total internal reflection

Diffraction

The disturbance travelling in a medium is called:

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Wave motion

Simple harmonic motion

Motion

both a ,b

The closed switch in Boolean expression is represented by:

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0

1

10

2

A conductor of electric current is:

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Wood

Rubber

Plastic

Copper

Diffraction of wave can be observed clearly only when the size of slit or obstacle is nearly ………. To the wavelength of the wave:

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Two times

Equal

Four times

Half

Power of electric heater is:

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1500W

4750W

100W

50W

Which wire has lowest resistance?

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Thick wire

Thin wire

Very thin wire

All

An object of placed at he centre of curvature of a concave mirror. The image produced by the mirror is located:

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out beyond the centre of curvature.

at the centre of curvature

between the centre of curvature and the focal point

at the focal point

In medical field, C.R.O is used to display:

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Heart beats

Pictures of organs

Pictures of bones

Blood pressure

Which consumes small power.

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Inductor

Resistor

Motor

All of these

The value of Stefan is constant is:

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4.57 x 10^-8 m²k²

5.67 x10^-8 wm^-2k^-4

6.67x 10^-11 wm²k⁴

7.45 x 10^-9 m² wk³

Which of the following does not undergo plastic deformation.

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Copper

Wrought iron

Head

Glass

Those materials whose resistivity becomes zero at certain temperature is called:

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Semiconductor

Super conductor

Conductor

Insulator

Lenz's law is a consequence of the law of conservation of

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Charge

Momentum

Energy

Angular momentum

A resistance frequency the impedance of RLC parallel circuit is.

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Zero

Infinite

Maximum

Minimum

Energy band theory is based upon

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Hund's Rule

Heisenberg uncertainty principle

Bohr's atomic Model

Wave mechanical model

Coulomb's force is:

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Conservative force

None conservative force

Similar to frictional force

None of the above

If the north pole of a magnet moves away from a metallic ring

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Clockwise

Anticlockwise

First clockwise and then anticlockwise

None of above

A charge on 4 coulomb is in the field of intensity 4N/C the force on the charge is.

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Uniform

Non uniform

Weak

Strong

Before and after nuclear reaction the number of protons and neutrons:

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Must be different

Must be decreased

Must be increased

Remains same

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