In field and wave electromagnetics 2nd edition (david k cheng) problem 6-6
figure 6-37 shows a...
Physics, 10.07.2019 23:40, pilararcos
In field and wave electromagnetics 2nd edition (david k cheng) problem 6-6
figure 6-37 shows an infinitely long solenoid with air core having a radius b and n closely wound turns per unit length. the windings are slanted at an angle α and carry a curren i. determine the magnetic flux density both inside and outside the solenoid.
in solution this problem can be divided two small problems. magnetic flux density due to surface of the cylindrical tube b1
and magnetic flux density due to solenoid coil b2 and solution say surface current is 2πbnisinα.
but i cant understand why surface current is 2πbnisinα. why solenoid length l is ignored?
Answers: 3
Physics, 22.06.2019 05:10, zionnahl
Total solidification times of three casting geometries are to be compared: a sphere, a cylinder, in which the length-to-diameter ration - 1.0, and a cube. volume = 1000 cm^3 for all three shhapes, and the same casting alloy is used. a) determine the solidification times of each geometry b) based on the results of part (a), which geometric element would make the best riser? c) if the mold constant = 3.5 min/cm^2 in chvorinov's rule, compute the total solidification time for each casting.
Answers: 3
Mathematics, 19.03.2021 17:10
Mathematics, 19.03.2021 17:10
Mathematics, 19.03.2021 17:10
Mathematics, 19.03.2021 17:10