A) what happens to resistance of conductor when its area of cross section is increased? (b) write the relation between heat produced in a conductor when a potential difference ‘v’ is applied across its terminals and current ‘i’ flows for time ‘t’. (c) what is the shape of v–i graph for a metallic wire ? (d) length of a wire and its cross sectional area is doubled. what is the change in its resistivity ? (e) write one essential characteristic of the material to be used for fuse wire?
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Explanation:
a. if the area of cross sectionis increased the current will flow fluently.
d. if length is increased it will take some time to flow and in that case it will flow very fast .
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