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(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.
Explain the concept of electric potential difference in terms of work done in transferring the charge.
Explain why does a metal wire when connected to a cell offer resistance to the flow of current.
State Ohm’s law.
How are the potential difference (V), current (l) and resistance (R) related?
What is the other name of a variable resistor?
What is the SI unit of resistance?
A bulb is connected to a cell. How is the resistance of circuit affected if another identical bulb is connected (i) in series, (ii) in parallel, with the first bulb?
Compare the brightness of two 60 watt bulbs.
When they are connected in series.
Explain giving scientific reasons.
