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QPages 304-305: Q9: HC Verma: Concepts of Physics - Volume 2 Electromagnetic Induction Pages 304-305: Q9 Solution: Figure shows a conducting loop being pulled out of a magnetic…
⚠️ Common Exam Traps & Conceptual Pitfalls
Students often assume power is linearly proportional to velocity ($P \propto v$) or confuse it with the induced EMF ($\mathcal{E} \propto v$). You must recognize that the magnetic force is $F = \frac{B^2 l^2 v}{R}$, so the mechanical power $P = Fv$ scales as $v^2$, requiring a parabolic plot rather than a straight line.
Figure shows a conducting loop being pulled out of a magnetic field with a speed v. Which of the four plots shown in figure b) may represent the power delivered by the pulling agent as a function of the speed v?
Multiple Choice Options
- A Plot a
- B Plot b
- C Plot c
- D Plot d
Step-by-Step Verified Solution
**Answer:** Plot c.
**Step-by-Step Explanation:**
Power P = Fv = (B_l_v/R)v = B_l_v_/R _ v_. Plot c represents this.
All Questions in this Chapter
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