Question

an electric circuit containing a cell and a torch bulb is completed by the following objects turn by turn a matchstick, iron nail eraser , a glass bangle and a key?​

Answer 1

Explanation:

ELECTRIC CIRCUIT IS COMPLETE ONLY IF THREE THINGS ARE PRESENT A SOURCE LIKE CELL OR BATTERY,SWITCH OR A CONDUCTOR BETTER USE A SWITCH AS WE HAVE TO SWITCH OFF AND ON TO CONTROL THE FLOW OF CURRENT.

AND A RESISTOR.

SO,HERE IN THIS CASE IF SWITCH IS REPLACED BY IRON NAIL AND KEY METAL THEN ONLY IT WILL GLOW AS THEY ARE CONDUCTORS.

IN OTHER CASES IT WILL NOT GLOW.