Physics
Write symbols and state functions of each of the following components in an electric circuit —
(i) key
(ii) cell
(iii) rheostat
(iv) ammeter
(v) voltmeter
Answer
The symbol and function of the components are as follows —
(i) Key
Symbol:
Function:
A key is used to put the current on and off in a circuit.
(ii) Cell
Symbol:
Function:
A cell acts as a source of direct current for the circuit.
(iii) Rheostat
Symbol:
Function:
It controls the flow of current in a circuit.
(iv) Ammeter
Symbol:
Function:
An ammeter is an instrument used to measures the magnitude of current flowing in a circuit.
(v) Voltmeter
Symbol:
Function:
A voltmeter is used to measure the potential difference between two points of a circuit.
Related Questions
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Distinguish between a closed circuit and an open circuit, with the use of suitable labelled diagram.
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(a) Complete the circuit given in figure by inserting between the terminals A and C, an ammeter. (b) In the diagram mark the polarity at the terminals of ammeter and indicate clearly the direction of flow of current in the circuit, when the circuit is complete. (c) Name and state the purpose of Rh in the circuit.
