Question

A permanent magnet in the shape of a thin cylinder of length 50 cm has intensity of magnetisaton 106 m-1. The magnetisation current is

• A. 5 x 105 A
• B. 6 x 10s A
• C. 5 x 104 A
• D. 6 x 104 A

Answer 1

Answer: (A)

5 x 105 A

Answer 2

: Here, , $\mathrm { l } = 50 \mathrm {~cm} = 0.5 \mathrm {~m} , \mathrm { M } = 10 ^ { 6 } \mathrm { Am } ^ { - 1 }$

As ,

Then, ,

$= 10 ^ { 6 } \times 0.5 = 10 ^ { 5 } \mathrm {~A}$