Question # 1

The brain of any computer system is:

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CUP

Monitor

Memory

C.U

Specific resistance of silver is:

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1.7x10^-8 Ω.m

2.63x10^-8 Ω.m

2.75x10^-8 Ω.m

7.0x10^-8 Ω.m

1 bel=

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0.1 dB

10 dB

100 dB

0.01 dB

Joule's law is W = ____________________

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IR/t

IRt²

IR²t

I²Rt

Which wire has lowest resistance?

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Thick wire

Thin wire

Very thin wire

All

According to ohm’s law V= :

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I²R

IR²

IR

I/R

The equivalent resistance of a parallel combination is

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equal to sum of all resistance

is greater than the largest resistance of combination

is smaller than the smallest resistance of combination

All of these

The device which converts digital quantities into analog quantities is called:

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ADC

DAC

ACD

CAD

At mean position of pendulum, the potential energy of the pendulum is:

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Maximum

Minimum

Much more

Both a and c

The current used in houses is:

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A.C.

Conventiona current

Current

D.C

The 1st practical electric battery is known as:

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Voltaic

Pile

Voltaic pile

Voltaic cell

Changing magnetic field in a closed circuit can induce:

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e.m.f

Electric current

Force

Both A and B

A transformer has Np =100 and Ns =500 , if 6 volt D.C is applied across its primary, the induced voltage.

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0 V

30 V

45 V

60 V

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