| ⇦ | 
| ⇨ |
The effective length of magnet is 31.4 cm and its pole strength is 0.8Am. The magnetic moment, if it is bent in the form of a semicircle is …….. A-m²
Options
(a) 1.2
(b) 1.6
(c) 0.16
(d) 0.12
Correct Answer:
0.16
Explanation:
The effective length of magnet = 31.4 cm
Pole strength, m = 0.8 Am
Length of semi-circle = π (D / 2) = l
where, D = diameter of circle
D = 2l / π = (2 × 31.4 × 10²) / 3.14 = 20 × 10⁻² m
Now, the magnetic moment = ml = mD = 0.8 × 20 × 10⁻² m
= 16 × 10⁻² = 0.16 A-m²
Related Questions:
- A light of wavelength 5000Å falls on a sensitive plate with photoelectric work
- Which of the following phenomena does not show the wavenature of light?
- Three capacitors of capacitances 3 μF, 10 μF and 15 μF are connected in series
- A small angled prism of refractive index 1.4 is combined with another small angled prism
- A boat of anchor is rocked by waves whose crests are 100 m apart and velocity
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