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ICSE Class 9 Physics Question 1 of 18

Current Electricity — Question 4

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Question

Question 4

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:

Write symbol and state function of key in an electric circuit. Current Electricity, Concise Physics Solutions ICSE Class 9.

Function:
A key is used to put the current on and off in a circuit.

(ii) Cell

Symbol:

Write symbol and state function of cell in an electric circuit. Current Electricity, Concise Physics Solutions ICSE Class 9.

Function:
A cell acts as a source of direct current for the circuit.

(iii) Rheostat

Symbol:

Write symbol and state function of rheostat in an electric circuit. Current Electricity, Concise Physics Solutions ICSE Class 9.

Function:
It controls the flow of current in a circuit.

(iv) Ammeter

Symbol:

Write symbol and state function of Ammeter in an electric circuit. Current Electricity, Concise Physics Solutions ICSE Class 9.

Function:
An ammeter is an instrument used to measures the magnitude of current flowing in a circuit.

(v) Voltmeter

Symbol:

Write symbol and state function of Voltmeter in an electric circuit. Current Electricity, Concise Physics Solutions ICSE Class 9.

Function:
A voltmeter is used to measure the potential difference between two points of a circuit.