Question

Which of the following circuits will light up the bulb

Answer 1

hi friend hope this answer helps you. option b is the correct answer

Answer 2

Hey MATE!!!

In 1st case the comb stops the flow of current since it is a plastic.

In 2nd case the bulb glows since the circuit is complete.

In 3rd case the bulb glows since graphite is a conductor of electricity.

In 4th case wood stops the flow of current.

Hope it helps

#Follow ME!! :))