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प्रश्न
A toroidal solenoid with air core has an average radius 'R', number of turns 'N' and area of cross-section 'A'. The self-inductance of the solenoid is (Neglect the field variation cross-section of the toroid)
विकल्प
`(mu_0"N"^2"A")/"R"`
`(mu_0"NA")/(2pi"R")`
`(mu_0"NA")/("R")`
`(mu_0"N"^2"A")/(2pi"R")`
MCQ
उत्तर
`(mu_0"N"^2"A")/(2pi"R")`
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