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A solenoid of length 50cm with 20 turns per centimetre and area of cross-section 40cm? completely surrounds another coaxial solenoid of the same length, area of cross-section 25cm^(2) with 25 turns per centimetre. Calculate the mutual inductance of the system. |
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Answer» Solution :`l-50cm=(1)/(2)m` `N_(1)=20 xx 50=1000, A_(1)=40xx10^(-4) m^(2)` `N_(2)=25 xx 50=1250, A_(2)=25 xx 10^(-4) m^(2)` `M=(mu_(0)N_(1)N_(2)A_(2))/(l)=(4 pi xx 10?^(-7) xx 1000 xx 1250 xx 25 xx 10^(-4))/(1 // 2)H` `=7.9 xx 10^(-3)H=7.9` MH |
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