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QPages 218-219: Q1: HC Verma: Concepts of Physics - Volume 2 Thermal and Chemical Effects of Electric Current Pages 218-219: Q1 Solution: An electric current of 2.0 A passes through a wire of…

⚠️ Common Exam Traps & Conceptual Pitfalls

Students frequently insert the time as 1 minute directly into $H=I^{2}Rt$, yielding a ten‑fold error; always convert the duration to seconds (SI unit) before applying Joule's law.

An electric current of 2.0 A passes through a wire of resistance 25 Ω25 \ \Omega. How much heat will be developed in 1 minute?

Step-by-Step Verified Solution

**Answer:** Heat developed = 6000 J. **Step-by-Step Explanation:** i=2.0i = 2.0 A, R=25 ΩR = 25\ \Omega, t=1t = 1 min =60= 60 s.
H=i2Rt=(2)2×25×60=6000 JH = i^2 R t = (2)^2 \times 25 \times 60 = 6000\ \text{J}

All Questions in this Chapter

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