Question # 1

A normal eye can see near objects clearly at a distance of:

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20 cm

25 cm

30 cm

35 cm

The ratio of image height to object height is called:

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Linear magnification

Power

Refraction

Radius of curative

The electrostatic force acting on two charges each of 1 C separated by 1m is about .

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9 x 10⁹ N

9 x 10^-9N

9 x 10⁸N

9 x 10^-8N

1 Nano farad is equal to:

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1X10^-12F

1X10⁹F

1X10^-9F

1X10^-6F

If a charged body is brought near a negatively charged electroscope and the leaves of electroscope diverge, then the body is:

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Positively charged

Negatively charged

Neutral

None of these

A parallel circuit is also used as a divider for:

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Power

Resistance

Current

Voltage

Boolean expression for AND operation is:

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X = A̅

X = A + B

X = A . B

X = A̅B̅

Electric current in conductors is due to the flow of:

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Positive ions

Negative ions

Positive charge

Free electrons

If X = A,B, then X is 1 when:

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A and B are 1

A or B is 0

A is 0 and B is 1

A is 1 and B is 0

The intensity level of whispering is:

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20 dB

30 dB

40 dB

50 dB

The presence of a magnetic field can be detected by a

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small mass

Stationary positive charge

Stationary negative charge

Magnetic compass

The phenomena used in capacitor is:

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electrostatic induction

induced current

electric field

electroscope

Which of the following characteristics of a wave is independent of the others:

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speed

frequency

amplitude

wavelength

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