| ⇦ | 
| ⇨ |
A bar magnet has a coercivity of 4×10³ Am⁻¹. It is placed inside a solenoid of length 12 cm having 60 turns in order to demagnetise it. The amount of current that should be passed through the solenoid is
Options
(a) 16A
(b) 8A
(c) 4A
(d) 2A
Correct Answer:
8A
Explanation:
No explanation available. Be the first to write the explanation for this question by commenting below.
Related Questions: - According to Bohr model of hydrogen atom, only those orbits are permissible
- A step down transformer is used on a 1000 V line to deliver 20 A at 120 V
- Length of second pendulum is
- Angle of minimum deviation for a prism of reractive index 1.5 equal to the angle
- The earth radiates in the infrared region of the spectrum. The spectrum is correctly
Topics: Magnetic Effects of Current and Magnetism
(167)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- According to Bohr model of hydrogen atom, only those orbits are permissible
- A step down transformer is used on a 1000 V line to deliver 20 A at 120 V
- Length of second pendulum is
- Angle of minimum deviation for a prism of reractive index 1.5 equal to the angle
- The earth radiates in the infrared region of the spectrum. The spectrum is correctly
Topics: Magnetic Effects of Current and Magnetism (167)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
18000+ students are using NEETLab to improve their score. What about you?
Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.
Share this page with your friends
Leave a Reply