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प्रश्न
A circular coil has radius ‘r', number of turns ‘N’ and carries a current ‘I’. Magnetic flux density ‘B’ at its centre is ______.
विकल्प
B = μ0NI
B = `(μ_0"NI")/"2r"`
B = `(μ_0"NI")/(4πr)`
B = `(μ_0"NI")/"4r"`
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उत्तर
A circular coil has radius ‘r', number of turns ‘N’ and carries a current ‘I’. Magnetic flux density ‘B’ at its centre is `bbunderline("B" = (μ_0"NI")/"2r")`.
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