A solenoid and a bulb are connected with a ac source . How will the brightness of bulb change if an iron core is inserted in the solenoid?

Answers (1)

As iron is inserted, the magnetic field inside of the solenoid coil  increases. hence, the its inductive reactance increases.

        As X_{L}=L\omega

for inductor, I is equal to  I=\frac{V}{ L\omega }

therefore, current decreases as increase in L and hence brightness of bulb decreases.

 

Preparation Products

Knockout NEET Sept 2020

An exhaustive E-learning program for the complete preparation of NEET..

₹ 15999/- ₹ 6999/-
Buy Now
Rank Booster NEET 2020

This course will help student to be better prepared and study in the right direction for NEET..

₹ 9999/- ₹ 4999/-
Buy Now
Test Series NEET Sept 2020

Take chapter-wise, subject-wise and Complete syllabus mock tests and get in depth analysis of your test..

₹ 4999/- ₹ 2999/-
Buy Now
Knockout NEET May 2021

An exhaustive E-learning program for the complete preparation of NEET..

₹ 22999/- ₹ 14999/-
Buy Now
Knockout NEET May 2022

An exhaustive E-learning program for the complete preparation of NEET..

₹ 34999/- ₹ 24999/-
Buy Now
Exams
Articles
Questions