A solenoid has [N] turns wound uniformly around a cylindrica…
A solenoid has [N] turns wound uniformly around a cylindrical core of length [L] cm and diameter [d] cm. The magnetic field inside and near the center of the solenoid is measured to be B =[B] × 10−2T. The current fowing through the solenoid = ……A. Given µ0 = 4 π X 10-7 T∙m/A {Hint: First find n=N/L, then use relation B=μ0 NI}
Read DetailsA steel railroad track is `L` m long at its regular normal t…
A steel railroad track is `L` m long at its regular normal temperature. The track is exposed to temperature variations ranging from -`t1`°C to `t2`°C. The linear expansion coefficient of steel is .The maximum possible change in length of the track between these temperature will be ………………m.
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