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+// Example 5.4;reading
+clc;
+clear;
+disp("part (i)")
+// given :
+format('v',6)
+vm=100;//volts
+rc=10;//ohms
+im=vm/rc;//amperes
+t=0:2*%pi;//time rane
+x=intsplin(t,(sin(t))^2);//variable
+Irms=sqrt((1/(2*%pi))*im^2*x);//current in amperes
+disp(Irms,"indication of moving iron instrument is,(A)=")
+disp("part (ii)")
+t1=0;//time interval
+t2=%pi;//time inerval
+x=integrate('sin(t)','t',t1,t2);//variable
+Iav=(1/%pi)*x*(im/2);//current in amperes
+disp(Iav,"indication of moving coil instrument is,(A)=")
+//answer of part a is calculated wrong in the textbook