basic electrical introduction

one coulomb of charge is equal to the charge on

• $625\times10^{16}\ electrons$

• $6.25\times10^{16}\ electrons$

• $62.5\times10^{16}\ electrons$

• $0.625\times10^{16}\ electrons$

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

A length of wire has a resistance of 6 ohms. The resistance of a wire of the same material three times as long and twice the cross-sectional area will be

• 36 ohms

• 9 ohms

• 1 ohm

• 12 ohms

The unit of resistivity is

• Ω.

• Ω - metre.

• Ω / metre.

• Ω / m².

Which of the followings is/are active element?

• Voltage source

• Current source

• Both

• None of these.

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

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.