18. A device P produces electricity from the chemicals stored in it. I

18. A device P produces electricity from the chemicals stored in it. It has a metal cap Q and ametal disc R. The device P is commonly used in alarm clocks, toys, torches, televisionremote controls, etc.(1xOn the basis of this data, answer the following questions:i) What is P'?ii) What type of terminal is 'Q'?iii) What type of terminal is 'R'?iv) If we connect Q and R to the two terminals of a bulb, with the help of a wire, thenwhat will such an arrangement be called?

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<P>Answer:

4. This ARRANGEMENT will be CALLED an electric circuit.