(A): Current is passed through a metallic wire, heating it red. Half of its portion is cooled (by cold water jacket), then rest ofthe half portion become more hot. (R ) : Resistance decreases due to decrease in temperature and so current through wire increases.

(A): Current is passed through a metallic wire, heating it red. Half o

1.	(A): Current is passed through a metallic wire, heating it red. Half of its portion is cooled (by cold water jacket), then rest ofthe half portion become more hot. (R ) : Resistance decreases due to decrease in temperature and so current through wire increases.
Answer» Both 'A' and 'R' are TRUE and 'R' is the correct explanation of 'A' Both 'A' and 'R' are true and 'R' is not the correct explanation of 'A' 'A' is true and 'R' is FALSE 'A' is false and 'R' is false ANSWER :A

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(A): Current is passed through a metallic wire, heating it red. Half of its portion is cooled (by cold water jacket), then rest ofthe half portion become more hot. (R ) : Resistance decreases due to decrease in temperature and so current through wire increases.

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