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Current i=2.5A flows along the circle x 2 +y 2 =9cm 2 (here x and y are in cm).Magnetic field at point (0,0,4cm) is?? I think we have to use the formula for magnetic field along the axis of a circular ring.But answer is coming out to be (9/25)(pie)(10 -7 ) but answer is given something else.Plzz tell me where i am wrong.(Maybe a calc. error,plz chk that too:))


Current i=2.5A flows along the circle x2+y2=9cm2(here x and y are in cm).Magnetic field at point (0,0,4cm) is??
I think we have to use the formula for magnetic field along the axis of a circular ring.But answer is coming out to be (9/25)(pie)(10-7) but answer is given something else.Plzz tell me where i am wrong.(Maybe a calc. error,plz chk that too:))


Grade:11

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