Question

why does the bulb lights when the needle touches a paper clip?
options are :
1) Convection cell are produced
2)a circuit is completed
3) vibration set up wave like disturbance 4) a state change occurs​

Answer 1

a circuit is,completed.....

hope it will help u ...

remember to make it as brainlist answer...

Answer 2

Answer:

2)a circuit is completed is the answer

Explanation:

because the current passes through bulb and it lights up when the circuit is completed only