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

Open in App

Solution

A key or switch is used to put on or off, the current in the circuit.

Suggest Corrections

Similar questions

Q. State the function of the following in an electric circuit and draw their symbols.
(i) Switch or Key
(ii) Cell

Q. Explain the function of a switch in an electric circuit? [2 MARKS]

What is a circuit diagram? Draw the labeled diagram of an electric circuit comprising of a cell, a resistor, an ammeter, a voltmeter and a closed switch (or closed plug key). Which of the two has a large resistance: an ammeter or a voltmeter?

Answer the following questions.

(a) Why is the direction of the current in an electric motor reversed after every half round?

(b) How can the strength of an electro-magnet be increased?

(d) Why is there a key in an electrical circuit?

(e) Is the mechanism of a shirt button like that of the key in an electric circuit?

A device that breaks or completes a circuit is known as an electric switch.