JEE Main 2026 — Electromagnetic Induction Question with Solution
JEE Main 2026 (08 April Shift 2)
Question
A cm long solenoid has turns per cm and area of cm. The current through the solenoid coil varies from A to A in s. The e.m.f. induced in the coil is V. The value is ________.
Choose an option
Show full solutionCorrect option: B
Correct answer
B
Step-by-step explanation
Given:
Length of the solenoid,
Number of turns per unit length,
Area of cross-section,
Change in current,
Time interval,
The self-inductance of the solenoid is given by:
Substituting the given values:
The magnitude of the induced e.m.f. is:
Substituting the values of , , and :
Using :
Comparing this with , we get:
Answer:
Length of the solenoid,
Number of turns per unit length,
Area of cross-section,
Change in current,
Time interval,
The self-inductance of the solenoid is given by:
Substituting the given values:
The magnitude of the induced e.m.f. is:
Substituting the values of , , and :
Using :
Comparing this with , we get:
Answer:
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This is a previous-year question from JEE Main 2026, covering the Electromagnetic Induction chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.