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+//Caption:Program to find noise voltage.
+//Exa:1.1
+clc;
+clear;
+close;
+//Given:
+b_w=6000000;//bandwidth in hertz
+T=290;//temperature in kelvin
+k=1.36*10^-23;//constant
+R=500//ohms
+V_n=sqrt(4*k*T*b_w*R);
+printf("\n\n\t noise voltage = %f v ",V_n);