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Solution
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Write symbol and state function of following component in an electric circuit :
ammeter
(a) Complete the circuit given in Fig. 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.
State and define the S.I. unit of potential difference.
Explain why does a metal wire when connected to a cell offer resistance to the flow of current.
How electric current flows in solids?
Calculate the total number of electrons flowing through a circuit in 20 mins and 40 s, if a current of 40 μA flows through the circuit.
[1 e– = 1.6 × 10-19 C]
Assuming that the charges of an electron is 1.6 × 10-19 coulombs, the number of electrons passing through a section of wire per sec, when the wire carries a current of one ampere is:
State two characteristics of resistances in the series circuit.
What do you understand by the term parallel circuit?
