diff options
Diffstat (limited to '147/CH18')
| -rw-r--r-- | 147/CH18/EX18.1/Example18_1.sce | 18 | ||||
| -rw-r--r-- | 147/CH18/EX18.1/Result18_1.txt | 3 | ||||
| -rw-r--r-- | 147/CH18/EX18.2/Example18_2.sce | 9 | ||||
| -rw-r--r-- | 147/CH18/EX18.2/Result18_2.txt | 1 | ||||
| -rw-r--r-- | 147/CH18/EX18.3/Example18_3.sce | 16 | ||||
| -rw-r--r-- | 147/CH18/EX18.3/Result18_3.txt | 1 | ||||
| -rw-r--r-- | 147/CH18/EX18.4/Example18_4.sce | 15 | ||||
| -rw-r--r-- | 147/CH18/EX18.4/Result18_4.txt | 2 | ||||
| -rw-r--r-- | 147/CH18/EX18.5/Example18_5.sce | 19 | ||||
| -rw-r--r-- | 147/CH18/EX18.5/Result18_5.txt | 1 | ||||
| -rw-r--r-- | 147/CH18/EX18.6/Example18_6.sce | 16 | ||||
| -rw-r--r-- | 147/CH18/EX18.6/Result18_6.txt | 1 |
12 files changed, 102 insertions, 0 deletions
diff --git a/147/CH18/EX18.1/Example18_1.sce b/147/CH18/EX18.1/Example18_1.sce new file mode 100644 index 000000000..a16713681 --- /dev/null +++ b/147/CH18/EX18.1/Example18_1.sce @@ -0,0 +1,18 @@ +close();
+clear;
+clc;
+//meter resistance 'rm', meter current 'Ifs', Maximum current to be measured 'I', Maximum voltage measured 'V'
+rm = 5; //ohm
+Ifs = 0.015; //A
+
+//(i)
+I = 2; //A
+//resistance of shunt required 'Rsh'
+Rsh = Ifs*rm/(I-Ifs); //ohm
+mprintf("(i) Resistance of shunt, Rsh = %0.6f ohm\n\n",Rsh);
+
+//(ii)
+V = 100; //V
+//series resistance 'Rse'
+Rse = V/Ifs - rm; //ohm
+mprintf("(ii) The value of series resistance, Rse = %0.3f ohm",Rse);
\ No newline at end of file diff --git a/147/CH18/EX18.1/Result18_1.txt b/147/CH18/EX18.1/Result18_1.txt new file mode 100644 index 000000000..7c770aab8 --- /dev/null +++ b/147/CH18/EX18.1/Result18_1.txt @@ -0,0 +1,3 @@ +(i) Resistance of shunt, Rsh = 0.037783 ohm
+
+(ii) The value of series resistance, Rse = 6661.667 ohm
\ No newline at end of file diff --git a/147/CH18/EX18.2/Example18_2.sce b/147/CH18/EX18.2/Example18_2.sce new file mode 100644 index 000000000..55f6fa2d9 --- /dev/null +++ b/147/CH18/EX18.2/Example18_2.sce @@ -0,0 +1,9 @@ +//Dimension of coil lxb
+l = 15*10^(-3);//m
+b = 12*10^(-3);//m
+Ba = 1.8*10^(-3);//Wb/m^2
+k = 0.14*10^(-6);;//Nm/rad
+theta = %pi/2;
+I = 5*10^(-3);
+N = k*theta/(Ba*l*b*I);
+mprintf('Number of turns required N = %0.0f',N);
\ No newline at end of file diff --git a/147/CH18/EX18.2/Result18_2.txt b/147/CH18/EX18.2/Result18_2.txt new file mode 100644 index 000000000..f266e01f8 --- /dev/null +++ b/147/CH18/EX18.2/Result18_2.txt @@ -0,0 +1 @@ +Number of turns required N = 136
\ No newline at end of file diff --git a/147/CH18/EX18.3/Example18_3.sce b/147/CH18/EX18.3/Example18_3.sce new file mode 100644 index 000000000..f730846f1 --- /dev/null +++ b/147/CH18/EX18.3/Example18_3.sce @@ -0,0 +1,16 @@ +close();
+clear;
+clc;
+//resistance of moving coil voltmeter 'R', potential difference across terminals 'V', dimensions of moving coil 'l*d', number of turns 'N', flux density in gap 'B', final deflection 'theta'
+R = 200; //ohm
+V = 100*10^(-3); //V
+l = 30*10^(-3); //m
+d = 25*10^(-3); //m
+N = 100;
+B = 0.2; //Wb/m^2
+theta = 100; //degree
+//current in instrument for full scale deflection 'I'
+I = V/R; //A
+//control constant of spring 'K2'
+K2 = N*B*l*d*I/theta; //Nm/degree
+mprintf("Control constant of spring, K2 = %0.1e Nn/degree",K2);
\ No newline at end of file diff --git a/147/CH18/EX18.3/Result18_3.txt b/147/CH18/EX18.3/Result18_3.txt new file mode 100644 index 000000000..2ff9e20cf --- /dev/null +++ b/147/CH18/EX18.3/Result18_3.txt @@ -0,0 +1 @@ +Control constant of spring, K2 = 7.5e-008 Nn/degree
\ No newline at end of file diff --git a/147/CH18/EX18.4/Example18_4.sce b/147/CH18/EX18.4/Example18_4.sce new file mode 100644 index 000000000..34eaa4bfa --- /dev/null +++ b/147/CH18/EX18.4/Example18_4.sce @@ -0,0 +1,15 @@ +//Resistance of moving coil instrument R, Full deflection current I
+close();
+clear;
+clc;
+R = 10;//ohm
+I = 0.05;//A
+//Part (i)
+V = 750;
+Rse = V/I - R;
+//Part(ii)
+Ii = I;
+I = 100;
+Ish = I-Ii;
+Rsh = R*Ii/Ish;
+mprintf('(i)Rse = %0.2f k ohm\n(ii)Rsh = %0.0f m ohm',Rse/1000,Rsh*1000);
diff --git a/147/CH18/EX18.4/Result18_4.txt b/147/CH18/EX18.4/Result18_4.txt new file mode 100644 index 000000000..fd2f35697 --- /dev/null +++ b/147/CH18/EX18.4/Result18_4.txt @@ -0,0 +1,2 @@ +(i)Rse = 14.99 k ohm
+(ii)Rsh = 5 m ohm
\ No newline at end of file diff --git a/147/CH18/EX18.5/Example18_5.sce b/147/CH18/EX18.5/Example18_5.sce new file mode 100644 index 000000000..76b3a7122 --- /dev/null +++ b/147/CH18/EX18.5/Example18_5.sce @@ -0,0 +1,19 @@ +close();
+clear;
+clc;
+//time taken 't' for 'rev' revolutions, non-inductive load 'I', voltage 'V' and frequency 'f' of single phase energy meter with constant 'k'
+k = 200; //rev/kWh
+t = 180; //seconds
+rev = 10;
+I = 4.4; //A
+V = 230; //V
+f = 50; //Hz
+//pf = cos(phi)
+pf = 1; //for non-inductive load
+//Energy consumed 'E'
+E = V*I*t*pf/(1000*3600); //kWh
+//Energy registered by meter 'Eg'
+Eg = rev/k; //kWh
+//percentage error 'per_error'
+per_error = (Eg-E)*100/E;
+mprintf("Percentage error of the instrument = %0.3f %%",per_error);
\ No newline at end of file diff --git a/147/CH18/EX18.5/Result18_5.txt b/147/CH18/EX18.5/Result18_5.txt new file mode 100644 index 000000000..5d4a3d78a --- /dev/null +++ b/147/CH18/EX18.5/Result18_5.txt @@ -0,0 +1 @@ +Percentage error of the instrument = -1.186 %
\ No newline at end of file diff --git a/147/CH18/EX18.6/Example18_6.sce b/147/CH18/EX18.6/Example18_6.sce new file mode 100644 index 000000000..56fba1fae --- /dev/null +++ b/147/CH18/EX18.6/Example18_6.sce @@ -0,0 +1,16 @@ +//Number of revolutions per kWh N1 at V and I, Time t for revolutions N2
+close();
+clear;
+clc;
+V = 230;//V
+I = 10;//A
+N1 = 900;//revolution
+t = 69;//seconds
+N2 = 20;
+theta = 0;
+//Energy consumed 'E'
+E = V*I/2*cos(theta)*t/3600*10^(-3);
+//Number of revolutions meter should have of running correct 'N'
+N = E*N1;
+Error = (N2-N)/N*100;
+mprintf('Error = %0.4f %%',Error);
\ No newline at end of file diff --git a/147/CH18/EX18.6/Result18_6.txt b/147/CH18/EX18.6/Result18_6.txt new file mode 100644 index 000000000..3671eb205 --- /dev/null +++ b/147/CH18/EX18.6/Result18_6.txt @@ -0,0 +1 @@ +Error = 0.8192 %
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