Question

Marie-Dolores bought a hand crank flashlight just in case the power goes out. When she turns the handle very fast, the light goes on. In this case, cranking the handle is mechanical energy. The mechanical energy creates magnetic and electrical energy. This type of flashlight contains everything needed to create an electrical current that transforms electrical energy into light. However, it does NOT have one common component of a circuit. What is not needed for a flashlight like this?

A. Wires

B.Metal

C. A battery

D. A complete circuit


Please hurryyyyy

Answer 1

C. a battery is not needed for the hand cranked flash-light. the power used to generate the light comes from the cranking, so there is no need for a battery.

hope this helps! if you did not understand a step or concept please let me know!

Answer 2

Option C, A battery

Step-by-step explanation:

All electrical device need battery as a storage backup but in case of mechanically operated flashlight, when mechanical force is applied through cranking of handle, magnetic and electrical energy are produced. Hence the dependency of such mechanically operated electrical device on battery reduces and hence battery is not required in this case.

In most of such devices, the mechanical force causes a flywheel inside the device to spin which in turn causes the dynamo to operate and hence produce electricity .

Option C is correct.