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//=====================================================================================
//Chapter 13 example 7
clc;clear all;
//variable declaration
R1 = 180; //resistance in Ω
R2 = 20; //resistance in Ω
A = 0.005; //area in m^2
Ns = 1000; //number of turns on search coil
G1 = 100*10^-6; //galvanometer constant C
G2 = 100; //galvanometer throw
//calculations
Rs = R1+R2; //total resistance of secondary circuit in Ω
Q = G1*G2; //charge passed through ballistic galvanometer in C
//Q = i*t = (E/Rs)*t = ((2*phi*Ns)/(t*Rs))*t = (2*phi*Ns)/Rs
phi = (Q*Rs)/(2*Ns); //flux in Wb
B = phi/(A); //flux density in Wb/m^2
//result
mprintf("flux density = %3.2f Wb/m^2",B);
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