Question

Which circuit is a series circuit?

Answer 1

Answer: an example of a series circuit would be something like a string of Christmas lights. Others include lamps, turn indicators, flashlights, pretty much anything with a switch to activate it :)

Answer 2

A series circuit is one in which current passes through without any branches as there is only one loop and the current passing through each component or element or the circuit is same across the circuit.

A simple series circuit is a battery with positive and negative terminal connected to a resistor / resistors in series. For example, ON/OFF switch allows direct control of the device in fan, tube light e.t.c.