Question # 1

CD which is made of soft material is called:

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Hard disk

Floppy disk

Iron disk

Copper disk

An object gains excess negative charge after being rubbed against another object, which is:

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Neutral

Negatively charged

Charged

Either, a,b,and c

Electric field lines were introduced by:

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Faraday

Newton

Coulomb

Joule

The ratio of external force applied on the spring to displacement is called:

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Hook's law

Constant

Spring constant

A positive and negative charges are initially 4 cm apart. When they are moved closer together so that they are now only 1 cm apart, the force between them is:

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4 times smaller than before

4 times larger than before

8 times larger than before

16 times larger than before.

The focal length is related to radius of curvature by the formula:

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f = 2R

f = 4R

f = R/2

R = f/2

To see stomach problems we use:

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Gastroscope

Bronchoscope

Cystoscope

All of these

An example of input device of computer is.

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Key board

Printer

Monitor

RAM

In totally reflecting prism one angle is of 90°, and other two angles are of:

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30°,30°

45°,90°

45°,45°

40°,40°

The distance between two consecutive troughs or crests is called:

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wavelength

Frequency

Time period

None of these

Waves transfer:

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Energy

Wavelength

Velocity

frequency

The S.I unit of electric current is:

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Volt

Ampere

Coulomb

Watt

One micro coulomb charge is equal to:

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10^-3c

10³c

10⁶c

10^-6c

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