A) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A)
B) Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A)
C) Assertion (A) is true but Reason (R) is false
D) Assertion (A) is false and Reason (R) is also false
Correct Answer: B
Solution :
(b) Heater wire must have high resistance and high melting point, because in series current remains same, therefore according to Joule's law \[H={{i}^{2}}Rt/4.2\], heat produced is high if R is high. Melting point must be high, so that wire may not melt with increase in temperature.
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