Verified Solution • 2025–26 Session moderate

QJEEM20Ph33a2: JEE Main 2020 Physics - Class 12 JEEM20Ph33a2 Solution: A circular coil of radius 10 cm is placed in a uniform magnetic …

A circular coil of radius 10 cm is placed in a uniform magnetic field of 3.0 × 10–5 T with its plane perpendicular to the field initially. It is rotated at constant angular speed about an axis along the diameter of coil and perpendicular to magnetic field so that it undergoes half of rotation in 0.2 s. The maximum value of EMF induced (in μV) in the coil will be close to the integer _______.

Step-by-Step Verified Solution

At any time flux ϕ = BA cos ωt

|emf| = |dϕdt| = BAω sin ωt

|emf|max = BAω = BA2πT

= 3×10−5×π×(0.1)2×2π0.4

= 15 × 10-6

= 15 μV

Related Learning Resources & Exam Preparation

JEE Main 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