A bar magnet has grometrical legth 4.8 cm.The magnetic moment of bar,of pole stregth 20 Am is
A bar magnet has grometrical legth 4.8 cm.The magnetic moment of bar,of pole stregth 20 Am is
A. `0.8 Am^(2)`
B. `0.6 Am^(2)`
C. `0.4 Am^(2)`
D. `1.0 Am^(2)`
4 views
1 Answers
Correct Answer - A
`2l=(5)/(6)xx"geometric length"=(5)/(6)xx4.8=4cm`
` M=2l. M=15xx10^(-2)xx20=0.8 Am^(2)`
4 views
Answered