Question

1.An electric current can be produced in a closed loop
A) By connecting it to a battery, but not by moveing a magnet near it
B) By moveing a magnet near the loop, but not by connecting a battery
C) Connecting it to a battery, as well as by moveing a magnet near it
D) Neither By connecting a battery nor by moveing a magnet near it

Answer 1

I think option C is right.

Answer 2

An electric current can be produced in a closed loop by connecting it to a battery as well as by moving a magnet near it.

• For producing a current, we need a voltage source and a closed path.
• In a battery, chemical energy is stored which develops a voltage across the terminals, hence producing an electric current when connected across a closed loop.
• When a magnet is moved near a loop, the magnetic flux through the loop changes. We know from Faraday's law of Electromagnetic Induction that when a magnetic flux through a conductor changes, it induces an electromotive force (emf). So if the loop is closed the emf will produce a current.
• Therefore, an electric current can be produced in a closed-loop by connecting it to a battery as well as by moving a magnet near it.