A magnetic of length 10 cm and magnetic moment 1 `Am^(2)` is placed along side AB of an equilateral triangle ABC. If the length of the side AB is 10 cm. The magnetic induction at the point C is `(mu_(0)=4pixx10^(-7) Hm^(-1))`

Options

A. `10^(-9) T`
B. `10^(-7) T`
C. `10^(-5) T`
D. `10^(-4) T`

Answer

D

Explanation

Magnetic induction at point C
`B=(mu_(0))/(4pi)(m)/(d^(2))`
`implies m=(M)/(2l)=(1)/(0.1)=10 AM`
`implies B=(10^(-7))((10)/(0.01))=10^(-4)T.`