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Write symbol and state function of following component in an electric circuit :
cell
(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.
A cell of potential difference 12 V is connected to a bulb. The resistance of filament of bulb when it glows is 24Ω. Find the current drawn from the cell.
There is a positively charged sphere A and negatively charged sphere B, such that they are brought in electrical contact by a copper wire.
In which direction electronic current flows?
There is a positively charged sphere A and negatively charged sphere B, such that they are brought in electrical contact by a copper wire.
What is the potential of the spheres after electrical contact?
State the unit of electric potential and define it.
State the factors on which the electrical resistance of a wire depends.
Compare the brightness of two 60 watt bulbs.
When they are connected in series.
Explain giving scientific reasons.
