Question # 1

In variable capacitor, dielectric medium is:

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Paper

Air

Mica

Ceramic

1 GB = ______________ Megabytes.

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1022

1023

1024

1025

If we double both the current and the voltage in a circuit while keeping its resistance constant, the power:

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Remains unchanged

Halves

Doubles

Four time

SI unit of electric potential is:

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watt

volt

coulomb

joule

How does sound travel from its source to your ear:

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By changes in air pressure

By vibration in wires or strings

By electromagnetic waves

By infrared waves

What does the term e-mail stand for:

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Emergency mail

Electronic mail

Extra mail

External mail

The symbol of atomic mass number is:

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A

X

N

Z

The distance between principal focus and pole of mirror is called:

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Principal focus

Focal length

Aperture

Image

The equivalent resistance in parallel combination is:

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R_c=R₁+R₂+R₃ +.................+R_n

R_c=1/R₁+1/R₂+1/R₃+.................+1/R_n

a and b

None of these

Speed of light in air is ms^-1

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3 x 10⁸

3 x 10¹¹

3 x 10⁵

340

Level of noise recommended in eight, hour work day:

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80-90 dB

80-85- dB

85-90 dB

90-95 dB

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

When a Uranium (92 protons)ejects a beta particle, how many protons are left in the remaining nucleus?

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89 Protons

90 Protons

91 Protons

93 Protons

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