Suppose the resistance of the coil in the previous problem is 25 Ω. Assume that the coil moves with uniform velocity during its removal and restoration. Find the thermal energy developed in the coil during (a) its removal, (b) its restoration and (c) its motion.
Simran Bhatia , 10 Years ago
Grade 11
1 Answers
Aditi Chauhan
Last Activity: 10 Years ago
Sol. R = 25 Ω
(a) e = 50V , T = 0.25 s
I = e/R = 2A, H = i^2 RT
= 4 x 25 x 0.25 = 25 J
(b) e = 50 V, T = 0.25 s
I = e/R = 2A, H = i^2 RT = 25 J
(c) Since energy is a scalar quantity
Net thermal energy developed = 25 J + 25 J = 50 J.
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