counter code

DC Basics and Networks (Electrical Engineering) - MCQs

These are four options provided for the answers of the question only one option is right answer. You have to click any of the option to check your answer. You can also directly see the answer from the answer link below. if you want to see explaination of the answer you can click discuss link.

The hot resistance of the filament of a bulb is higher than the cold resistance because the temperature coefficient of the filament is
  • A. negative
  • B. infinte
  • C. zero
  • D. positive

What happens to the resistance of a condy if its lenght is increased three times and diameter is halved
  • A. resistance remains the same
  • B. resistance is increased 3 times
  • C. resistance is increased 6 times
  • D. resistance is increased 12 times

A 12 V automobile light is realted at 30 W. The total charge that flows its original value, its one minute is
  • A. 30 C
  • B. 12 C
  • C. 150 C
  • D. 180 C

The condition for the validity of ohm's law is that the
  • A. temperature should remain constant
  • B. current should be proportional to voltage
  • C. resistance must be wire wound type
  • D. all of the above

The flow of electric current ina conductor is due to flow of
  • A. electrons
  • B. protons
  • C. electrons and ions
  • D. charged particles

An electric current is the
  • A. random movement of electrons in a conductor
  • B. movement of free electrons predominately in one direction
  • C. pressure difference between two poles
  • D. the power that causes drift of electrons