Q. A $5℃$ rise in temperature is observed in a conductor by passing a current. When the current is doubled the rise in temperature will be approximately
A) $16℃$
B) $10℃$
C) $20℃$
D) $12℃$
Explanation
(c) Since $H \propto i^{2},$ so on doubling the current, the heat produced and hence the rise in temperature becomes four times
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.