Test Index

NCERT Class XII Chapter
Magnetism and Matter
Questions With Solutions

© examsnet.com
Question : 5 of 25
Marks: +1, -0
A closely wound solenoid of 800 turns and area of cross section 2.5 × 10–4m2 carries a current of 3.0 A. Explain the sense in which the solenoid acts like a bar magnet. What is its associated magnetic moment?
Solution:  
A current carrying closely wound solenoid acts like bar magnet. Each of the turn provide a dipole moment and all turns together provides the dipole moment of the magnet.
Total magnetic moment, M = NIA = 800 × 3 × 2.5 × 10–4 = 0.6 A m2
© examsnet.com
Go to Question:
Prev Question
Next Question