Basic Electrical Engineering

The specific resistance of a wire depends upon

• its length

• its cross-sectional area

• its dimensions

• its material

Which one of the following is the best conductor of electricity ?

• silver

• gold

• copper

• zinc

The unit of resistivity is

• Ω.

• Ω - metre.

• Ω / metre.

• Ω / m².

Which of the following are the passive elements?

• Resistor

• Bulb

• Both

• None of these.

Which quantity consists of a unit 1KWh ?

• Energy

• Time

• Power

• charge

Which of the followings is/are active element?

• Voltage source

• Current source

• Both

• None of these.

KCL works on the principle of which of the following

• law of conservation of charge.

• law of conservation of energy.

• both.

• None of the above.

KVL works on the principle of

• law of conservation of charge.

• law of conservation of energy.

• both.

• None of the above.

Electrical appliances are not connected in

series because

• series circuit is complicated

• power loss is more

• appliances have different current ratings

• none of the above

Electrical appliances are connected in

parallel because it

• is a simple circuit

• draws less current

• results in reduced power loss

• makes the operation of appliances

  independent of each other