Why are switches/keys used in a circuit?

Question

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Answer 1

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.

Answer 2

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.

Why are switches/keys used in a circuit?

To save power

To protect the system

To control a device

All of above

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.

Which of the following devices can be used to break an electric circuit:

What happens to a circuit when the switch is off?

What is the function of a key (or switch) in an electric circuit ?

When should we say that the circuit is closed?

A switch is an on-off device in an electric circuit.

Revise with Concepts

Battery

Basic Knowledge of Switch

Basic Knowledge of Electrical Symbols

Why are switches/keys used in a circuit?

To save power

To protect the system

To control a device

All of above

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.

Which of the following devices can be used to break an electric circuit:

What happens to a circuit when the switch is off?

What is the function of a key (or switch) in an electric circuit ?

When should we say that the circuit is closed?

A switch is an on-off device in an electric circuit.

Revise with Concepts

Battery

Basic Knowledge of Switch

Basic Knowledge of Electrical Symbols

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.