When same current passes for same time through a thick and thin wire_________________?
Correct answer: B. more heat is produced in thin wire
- A. more heat is produced in thick wire
- B. more heat is produced in thin wire
- C. no heat is produced in wire
- D. less heat is produced in thick wire
Explanation
For the same current and time, heat produced is H = I²Rt. A thin wire of the same material and length has greater resistance because its cross-sectional area is smaller, so it produces more heat. Option a, more heat in the thick wire, reverses the resistance-area relationship.
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