Which of the following precautions need not be taken while using electric gadgets/appliances/ circuit?
$(a)$. We should never touch a lighted electric bulb connected to the mains.
$(b)$. We should never experiment with the electric supply from the mains or a generator or an inverter.
$(c)$. We should never use just any wire or strip of metal in place of a fuse.
$(d)$. We should never turn the switch in ON position.

AcademicPhysicsNCERTClass 7

While using electric gadgets/appliances/circuits, "We should never turn the switch in ON position." This precaution does not need to be taken.

So, option $(d)$ is correct.

Updated on 10-Oct-2022 13:30:09