Verified Solution • 2025–26 Session
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QPages 306-313: Q19: HC Verma: Concepts of Physics - Volume 2 Electromagnetic Induction Pages 306-313: Q19 Solution: The magnetic field in the cylindrical region shown in figure…
The magnetic field in the cylindrical region shown in figure increases at a constant rate of 20.0 mT/s. Each side of the square loop abcd and defa has a length of 1.00 cm and a resistance of . Find the current magnitude and sense) in the wire ad if a) the switch is closed but is open, b) is open but is closed, c) both and are open and d) both and are closed.
Step-by-Step Verified Solution
**Answer:** (a) 1.25 _ 10__ A along ad (b) 1.25 _ 10__ A along da (c) 0 (d) 0.
**Step-by-Step Explanation:**
(a) Switch S_ closed: current in adef. E = A(dB/dt) = 10__ _ 2 _ 10__ = 2 _ 10__ V. R = 16 �. i = 1.25 _ 10__ A.
(b) Switch S_ closed: current in abcd in opposite direction.
(c) Both open: no closed circuit.
(d) Both closed: balanced Wheatstone bridge, no current in ad [citation:6].
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