abynvambchn abynvambchn

26-02-2024
Physics

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A circular loop of radius 10 cm carries a current of 2 ampere what is the magnetic field acting on a point P situated 20 cm away from the centre of the loop?

You may use the equation

B=Muo IR²/2(R²+x²) ^³/2

My doubt is why The value of B is -ve?

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