Question

Which of the following is a symbol of tapping the key.
A) 

B) 

C) 

D) All of the above

Answer 1

Hint: We can observe the symbols of keys used in the diagram of the electrical circuit and conclude which among the given options represent the tapping key. Through the keys we can represent either a circuit is open or closed .

Complete answer:
The keys in the electric circuits are used for allowing or blocking the flow of electric current in the circuit. For drawing the circuit, we use symbols to denote various components of the circuit.
The different types of keys are denoted by the following symbols:
i) Plug key: At this place the plug can be inserted to either block or allow the flow of current.

ii) Switch key: This is an on or off key resembling a switch to either block or allow the flow of current.

iii) Tapping key: This is the key for either blocking or allowing the flow of current by a tap (mostly manually). It’s symbol also shows it being bent through an arrow.

Therefore, it can be concluded that amongst the given options, option C) denotes a tapping key (closed).

Note:
The switches are an important part of the circuit, when we say they are closed, the load does not pass, the current is blocked, the energy is conserved and vice - versa.
The respective symbols are to be kept in mind to distinguish the type of keys used and also between various components of the circuit.