PHYSICS · Multi-part · CBSE · Physics · Current Electricity · Current Electricity
Problem
Two straight wires, each 50 cm long, are connected in series to a 6 V battery.
• Wire A is copper of diameter 1 mm. (Resistivity =1.7×10−8Ωm)
• Wire B is nichrome of diameter 0.5 mm. (Resistivity =1.1×10−6Ωm)
Answer the following parts:
(i) Calculate the heat produced in wire A in 5 s.
(ii) Calculate the heat produced in wire B in 5 s.
(iii) Which wire is likely to melt first? Justify your answer using the above calculations.