HC Verma: Concepts of Physics - Volume 2 Magnetic Field Due to a Current Pages 249-253: Q52 Solution: Two large metal sheets carry currents as shown in figure. The…

QPages 249-253: Q52: HC Verma: Concepts of Physics - Volume 2 Magnetic Field Due to a Current Pages 249-253: Q52 Solution: Two large metal sheets carry currents as shown in figure. The…

⚠️ Common Exam Traps & Conceptual Pitfalls

For an infinite sheet with surface current $K$, the magnetic field on the two sides has equal magnitude $\mu_0 K/2$ but opposite directions. Students often assume the same direction on both sides, leading to incorrect cancellation or addition. Always apply the right‑hand rule to determine the sign before superposing contributions from multiple sheets.

Two large metal sheets carry currents as shown in figure. The current through a strip of width

dl

K dl

where

K

is a constant. Find the magnetic field at the points P, Q and R.

Step-by-Step Verified Solution

**Answer:** At P:

B = \mu_0 K/2

(out of page). At Q:

B = 0

. At R:

B = \mu_0 K/2

(into page). **Step-by-Step Explanation:** Two large sheets with surface current

K

. Using Ampere's law for each sheet: At P (outside both): fields add,

B = \mu_0 K/2

. At Q (between sheets): fields cancel,

B = 0

. At R (outside both): fields add,

B = \mu_0 K/2

QPages 249-253: Q52: HC Verma: Concepts of Physics - Volume 2 Magnetic Field Due to a Current Pages 249-253: Q52 Solution: Two large metal sheets carry currents as shown in figure. The…

Step-by-Step Verified Solution

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