Question # 1

the substance in which electric current flows easily is called:

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transistor

semi conductor

insulator

conductor

Resistance of conductor is directly proportional to:

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Length

Pressure

Area

All of these

What is the power rating of a lamp connected to a 12 v source when it carries 2.5 A?

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4.8 W

14.5 W

30 W

60 W

What should household appliances be connected in parallel with the voltage source?

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to increase the resistance of the circuit

to decrease the resistance of the circuit

to provide each appliance the same voltage as the power source

to provide each appliance the same current as the power source

The product of frequency and time period is equal to:

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v

0

1

L

The combined resistance of two identical resistors, connected in series is 8Ω. Their combined resistance in a parallel arrangement will be:

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2Ω

4Ω

8Ω

12Ω

Which is not an e.m.f source:

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Generator

Solar cell

Battery

Rheostat

The open switch Boolean expression is represented by:

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0

1

10

2

Application of electrostatic is:

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Car painting

Photocopying

Extracting of dust

All of these

The speed of sound was accurately measured in:

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1736

1737

1738

1739

The half life of Lead Pb is

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10 hour

10.10 hours

10.6 hours

1 year

In case of OR and AND operation, if switches s₁ and s₂ both are open then lamp is:

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On

Off

Sometimes on and sometimes off

Neither on nor off

Which of the following reasons increase the importance of computer?

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Speedy

Long time storage of memory

Quick decision

All of these

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