Author: Irodov I.E.
Tags: physics
Text
I.E. Irodov Problems in General Physics, 1981 PROBLEM 3.223. Find the magnetic induction of the field at the point О of a loop with current I, whose shape is illustrated (a) in Fig. 3.60a, the radii a and b, as well as the angle <p are known; (b) in Fig. 3.60fe, the radius a and the side b are known. SOLUTION 3.223 (a) From the Biot-Savart law, dB Ho . (dl x 4л.1 So, magnetic field induction due to the segment 1 at O, Ho i Зл _ Ho i . .co Ho i . .co _ --------— + 0 +--------— sin 45 + — sin 45 +0 4л a 2 4ло 4ло 2 2a ' b Ho . 3л = 4л 1