Verified Solution • 2025–26 Session moderate

QPages 249-253: Q53: HC Verma: Concepts of Physics - Volume 2 Magnetic Field Due to a Current Pages 249-253: Q53 Solution: Consider the situation of the previous problem. A particle…

⚠️ Common Exam Traps & Conceptual Pitfalls

Students often set $qvB = mv^2/r$ and then solve for $v$ as $v = \sqrt{\frac{qBr}{m}}$, mistakenly squaring both sides; the correct step is to divide both sides by $v$ (since $v\neq0$) yielding $v = \frac{qBr}{m}$.

Consider the situation of the previous problem. A particle having charge qq and mass mm is projected from the point QQ in a direction going into the plane of the diagram. It is found to describe a circle of radius rr between the two plates. Find the speed of the charged particle.

Step-by-Step Verified Solution

**Answer:** v=qBrmv = \frac{qBr}{m}. **Step-by-Step Explanation:** The particle moves in a circle of radius rr between the plates. The magnetic field is due to the surface currents. v=qBrmv = \frac{qBr}{m} where BB is the field between the plates.

All Questions in this Chapter

QPage 248: Q1 QPage 248: Q2 QPage 248: Q3 QPage 248: Q4 QPage 248: Q5 QPage 248: Q6 QPage 248: Q7 QPage 248: Q8 QPage 248: Q9 QPage 248: Q10 QPage 248: Q11 QPage 248: Q12 QPage 249: Q1 QPage 249: Q2 QPage 249: Q3 QPage 249: Q4 QPage 249: Q5 QPage 249: Q6 QPage 249: Q7 QPages 248-249: Q1 QPages 248-249: Q2 QPages 248-249: Q3 QPages 248-249: Q4 QPages 248-249: Q5 QPages 248-249: Q6 QPages 248-249: Q7 QPages 248-249: Q8 QPages 248-249: Q9 QPages 248-249: Q10 QPages 248-249: Q11 QPages 248-249: Q12 QPages 249-253: Q1 QPages 249-253: Q2 QPages 249-253: Q3 QPages 249-253: Q4 QPages 249-253: Q5 QPages 249-253: Q6 QPages 249-253: Q7 QPages 249-253: Q8 QPages 249-253: Q9 QPages 249-253: Q10 QPages 249-253: Q11 QPages 249-253: Q12 QPages 249-253: Q13 QPages 249-253: Q14 QPages 249-253: Q15 QPages 249-253: Q16 QPages 249-253: Q17 QPages 249-253: Q18 QPages 249-253: Q19 QPages 249-253: Q20 QPages 249-253: Q21 QPages 249-253: Q22 QPages 249-253: Q23 QPages 249-253: Q24 QPages 249-253: Q25 QPages 249-253: Q26 QPages 249-253: Q27 QPages 249-253: Q28 QPages 249-253: Q29 QPages 249-253: Q30 QPages 249-253: Q31 QPages 249-253: Q32 QPages 249-253: Q33 QPages 249-253: Q34 QPages 249-253: Q35 QPages 249-253: Q36 QPages 249-253: Q37 QPages 249-253: Q38 QPages 249-253: Q39 QPages 249-253: Q40 QPages 249-253: Q41 QPages 249-253: Q42 QPages 249-253: Q43 QPages 249-253: Q44 QPages 249-253: Q45 QPages 249-253: Q46 QPages 249-253: Q47 QPages 249-253: Q48 QPages 249-253: Q49 QPages 249-253: Q50 QPages 249-253: Q51 QPages 249-253: Q52 QPages 249-253: Q53 QPages 249-253: Q54 QPages 249-253: Q55 QPages 249-253: Q56 QPages 249-253: Q57 QPages 249-253: Q58 QPages 249-253: Q59 QPages 249-253: Q60 QPages 249-253: Q61

Related Learning Resources & Exam Preparation

Chapter Practice Bank
Practice all topic-wise questions from Magnetic Field Due to a Current
Reference Textbook Solutions
Explore complete chapter exercises for HC Verma: Concepts of Physics - Volume 2
Competitive PYQ Question Bank
Browse year-wise authentic previous years' questions with solutions
Authentic CBT Mock Tests
Simulate official exam environment with live timer and percentile scoring