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Electric Switches

Question

Why are switches/keys used in a circuit?
To save power
To protect the system
To control a device
All of above

A

All of above

B

To save power

C

To control a device

D

To protect the system

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Solution

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Switches allow the user of gadget to turn off the gadget when not required. Hence, A and C follows.
Using a device only when required reduced the wear and tear and protects the system. Hence, B is correct. hence A , b and C all are correct that's why option D is answer.

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