Q 1361267125.     Circular arc of a wire of radius `R` makes an angle of `3pi/2` radians at the centre. If a current `i` flows through it, the magnetic field intensity at the centre of the circle will be


A

`frac{3mu_0i}{R}`

B

`frac{3mu_0i}{2R}`

C

`frac{3mu_0i}{4R}`

D

`frac{3mu_0i}{8R}`

HINT

Use `B = frac{mu_0i theta}{4 pi R}`

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