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[" 44.A solenoid of "0.4m" length with "...

[" 44.A solenoid of "0.4m" length with "500" turns earries "],[" a current of "3A" .A coil of "10" turns and of radius "],[0,01m" carries a current of "0.4A" .The torque required "],[" to hold the coil with its axis at right angles to that of "],[" solenoid in the middle point of it is "],[[" 1) "6 pi^(2)times10^(-7)Nm," 2) "3 pi^(2)times10^(-7)Nm],[" 3) "9 pi^(2)times10^(-7)Nm," 4) "12 pi^(2)times10^(-7)Nm]]

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