Is a switch essential for a circuit to operate

yes it is essential

Explanation:

a switch is an electrical component that can disconnect or connect the conducting path in an electrical circuit; controls current flow into a circuit

f=ma newton's second law 7x8=56n

the earths atmosphere is made up of nitrogen and oxygen. solids can turn into gasses through a process called sublimation. sublimation is the transition of a substance directly from the solid to the gas phase, without passing through the intermediate liquid phase.

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