initial commit / add all books

42 files changed, 615 insertions, 0 deletions

diff --git a/3769/CH5/EX5.1/Ex5_1.sce b/3769/CH5/EX5.1/Ex5_1.sce
new file mode 100644
index 000000000..ef54e0b5b
--- /dev/null
+++ b/3769/CH5/EX5.1/Ex5_1.sce
@@ -0,0 +1,11 @@
+clear
+//Given
+n=10**17
+e=1.6*10**-19               //C
+t=1.0                       //S
+
+//Calculation
+I=n*e/t
+
+//Result
+printf("\n The magnitude of current in the wire is  %0.3f  10**-2 A and direction is from left to right",I*10**2)
diff --git a/3769/CH5/EX5.10/Ex5_10.sce b/3769/CH5/EX5.10/Ex5_10.sce
new file mode 100644
index 000000000..7a0dd4251
--- /dev/null
+++ b/3769/CH5/EX5.10/Ex5_10.sce
@@ -0,0 +1,19 @@
+clear
+//Given
+r=0.12*10**-2                 //m
+I=10
+r1=0.08*10**-2                    //m
+I=10                                  //A
+e=1.6*10**-19                                  //C
+n=8.4*10**28
+
+//Calculation
+//
+A=%pi*(r**2)
+J=I/A
+A1=%pi*r1**2
+Vd=I/(e*n*A1)
+
+//Result
+printf("\n (i) Current density in the alluminium wire is  %0.1f  *10**6 A/m**2",J*10**-6)
+printf("\n (ii) Drift velocity of electrons in the copper wire is  %0.1f  *10**-4 m/S",Vd*10**4)
diff --git a/3769/CH5/EX5.11/Ex5_11.sce b/3769/CH5/EX5.11/Ex5_11.sce
new file mode 100644
index 000000000..848a13b44
--- /dev/null
+++ b/3769/CH5/EX5.11/Ex5_11.sce
@@ -0,0 +1,14 @@
+clear
+//Given
+D=0.13*10**-2
+R=3.4                       //ohms
+l=10.0
+
+//Calculation
+//
+A=(%pi/4.0)*D**2
+a=R*A/l
+b=1/a
+
+//Result
+printf("\n Conductivity of a material is  %0.1f  *10**6 S/m",b*10**-6)
diff --git a/3769/CH5/EX5.12/Ex5_12.sce b/3769/CH5/EX5.12/Ex5_12.sce
new file mode 100644
index 000000000..2bfde0cde
--- /dev/null
+++ b/3769/CH5/EX5.12/Ex5_12.sce
@@ -0,0 +1,14 @@
+clear
+//Given
+A1=25.0                            //mm**2
+l2=1                             //m
+R2=1/58.0
+A2=1
+l1=1000
+
+//Calculation
+R=(l1/l2)*(A2/A1)
+R1=R*R2
+
+//Result
+printf("\n The value of resistance is  %0.2f  ohm",R1)
diff --git a/3769/CH5/EX5.13/Ex5_13.sce b/3769/CH5/EX5.13/Ex5_13.sce
new file mode 100644
index 000000000..2006f5a01
--- /dev/null
+++ b/3769/CH5/EX5.13/Ex5_13.sce
@@ -0,0 +1,14 @@
+clear
+//Given
+R1=4.5
+A1=1
+A2=2.0
+l2=3
+l1=1.0
+
+//Calculation
+R=(l2/l1)*(A1/A2)
+R2=R*R1
+
+//Result
+printf("\n The resistance of another wire is  %0.3f  ohm", R2)
diff --git a/3769/CH5/EX5.14/Ex5_14.sce b/3769/CH5/EX5.14/Ex5_14.sce
new file mode 100644
index 000000000..277dc4ba3
--- /dev/null
+++ b/3769/CH5/EX5.14/Ex5_14.sce
@@ -0,0 +1,16 @@
+clear
+//Given
+r=1
+r1=0.5
+R1=0.15                    //ohm
+
+//Calculation
+//
+A1=(%pi/4.0)*r**2
+A2=(%pi/4.0)*r1**2
+l=A1/A2
+R=l*l
+R2=R*R1
+
+//Result
+printf("\n New resistance of the wire is  %0.3f  ohm", R2)
diff --git a/3769/CH5/EX5.16/Ex5_16.sce b/3769/CH5/EX5.16/Ex5_16.sce
new file mode 100644
index 000000000..f1c6b10d9
--- /dev/null
+++ b/3769/CH5/EX5.16/Ex5_16.sce
@@ -0,0 +1,15 @@
+clear
+//Given
+ne=2.8*10**18
+np=1.2*10**18
+e=1.6*10**-19
+t=1                             //S
+V=220
+
+//Calculation
+q=(ne+np)*e
+I=q/t
+R=V/I
+
+//Result
+printf("\n Effective resistance of the tube is  %0.0f  ohm",R)
diff --git a/3769/CH5/EX5.17/Ex5_17.sce b/3769/CH5/EX5.17/Ex5_17.sce
new file mode 100644
index 000000000..77be5c954
--- /dev/null
+++ b/3769/CH5/EX5.17/Ex5_17.sce
@@ -0,0 +1,13 @@
+clear
+//Given
+m=84                      //g
+d=10.5                    //g/cm**3
+a=1.6*10**-6
+
+//Calculation
+V=m/d
+s=V**(1/3.0)
+R=a/2.0
+
+//Result
+printf("\n Resistance between the opposite faces is  %0.3f  ohm", R)
diff --git a/3769/CH5/EX5.18/Ex5_18.sce b/3769/CH5/EX5.18/Ex5_18.sce
new file mode 100644
index 000000000..f95c8e356
--- /dev/null
+++ b/3769/CH5/EX5.18/Ex5_18.sce
@@ -0,0 +1,12 @@
+clear
+//Given
+l=1.001
+A=1.001
+
+//Calculation
+R=l*A
+R1=R-1
+A=R1*100
+
+//Result
+printf("\n Percentage change in its resistance is  %0.1f  percentage",A)
diff --git a/3769/CH5/EX5.19/Ex5_19.sce b/3769/CH5/EX5.19/Ex5_19.sce
new file mode 100644
index 000000000..1bc0d6d00
--- /dev/null
+++ b/3769/CH5/EX5.19/Ex5_19.sce
@@ -0,0 +1,15 @@
+clear
+//Given
+m=0.45                         //Kg
+R=0.0014                        //ohm
+a=1.78*10**-8                   //ohm
+d=8.93*10**3                       //Kg/m**3
+
+//Calculation
+//
+l=sqrt(R*m/(a*d))
+r=sqrt(m/(%pi*d*1.99))
+
+//Result
+printf("\n The value of length is %0.2f  m",l)
+printf("\n The value of radius is  %0.2f  mm",r*10**3)
diff --git a/3769/CH5/EX5.2/Ex5_2.sce b/3769/CH5/EX5.2/Ex5_2.sce
new file mode 100644
index 000000000..b3271eecc
--- /dev/null
+++ b/3769/CH5/EX5.2/Ex5_2.sce
@@ -0,0 +1,15 @@
+clear
+//given
+I=0.5
+T=1
+e=1.6*10**-19
+t=60               //minute
+
+//Calculation
+n=I*T/e
+q=I*t**2
+n1=q/e
+
+//Result
+printf("\n (i) The number of electrons passing a cross section of the bulb is  %0.1f *10**18 electrons/S",n*10**-18)
+printf("\n (ii) The number of electrons is  %0.1f *10**22 electrons/hour",n1*10**-22)
diff --git a/3769/CH5/EX5.20/Ex5_20.sce b/3769/CH5/EX5.20/Ex5_20.sce
new file mode 100644
index 000000000..25bf83bb2
--- /dev/null
+++ b/3769/CH5/EX5.20/Ex5_20.sce
@@ -0,0 +1,11 @@
+clear
+//Given
+R15=80                    //ohm
+a=0.004
+
+//Calculation
+R0=R15/(1+15*a)
+R50=R0*(1+a*50)
+
+//Result
+printf("\n The value of resistance at 50 degree C is  %0.2f  ohm",R50)
diff --git a/3769/CH5/EX5.21/Ex5_21.sce b/3769/CH5/EX5.21/Ex5_21.sce
new file mode 100644
index 000000000..16af83691
--- /dev/null
+++ b/3769/CH5/EX5.21/Ex5_21.sce
@@ -0,0 +1,14 @@
+clear
+//Given
+R20=20                         //ohm
+P=60                            //W
+V=120.0                           //Volts
+a=5*10**-3
+
+//Calculation
+I=P/V
+Rt=V/I
+t=(((Rt/R20)-1)/a)+R20
+
+//Result
+printf("\n Normal working temperature of the lamp is  %0.3f  degree C", t)
diff --git a/3769/CH5/EX5.22/Ex5_22.sce b/3769/CH5/EX5.22/Ex5_22.sce
new file mode 100644
index 000000000..d76ab3b17
--- /dev/null
+++ b/3769/CH5/EX5.22/Ex5_22.sce
@@ -0,0 +1,11 @@
+clear
+//Given
+R0=5                    //ohm
+R100=5.23                  //ohm
+Rt=5.795                   //ohm
+
+//Calculation
+t=((Rt-R0)/(R100-R0))*100
+
+//Result
+printf("\n The temperature of the bath is  %0.2f  degree C",t)
diff --git a/3769/CH5/EX5.23/Ex5_23.sce b/3769/CH5/EX5.23/Ex5_23.sce
new file mode 100644
index 000000000..3f4b9040c
--- /dev/null
+++ b/3769/CH5/EX5.23/Ex5_23.sce
@@ -0,0 +1,13 @@
+clear
+//Given
+A=15*10**-4                         //m**2
+a=7.6*10**-8                                // ohm m
+l=2000                              //m
+b=0.005                          //degree/C
+
+//Calculation
+R0=a*l/A
+R50=R0*(1+(b*50))
+
+//Result
+printf("\n The value of resistance is  %0.3f  ohm",R50)
diff --git a/3769/CH5/EX5.24/Ex5_24.sce b/3769/CH5/EX5.24/Ex5_24.sce
new file mode 100644
index 000000000..b31da8c39
--- /dev/null
+++ b/3769/CH5/EX5.24/Ex5_24.sce
@@ -0,0 +1,11 @@
+clear
+//Given
+a=0.004
+ac=0.0007
+R0=100
+
+//Calculation
+R=ac*R0/a
+
+//Result
+printf("\n The resistance of a copper filament is  %0.3f  ohm", R)
diff --git a/3769/CH5/EX5.28/Ex5_28.sce b/3769/CH5/EX5.28/Ex5_28.sce
new file mode 100644
index 000000000..29c22f764
--- /dev/null
+++ b/3769/CH5/EX5.28/Ex5_28.sce
@@ -0,0 +1,10 @@
+clear
+//Given
+R1=4.0                     //ohm
+R2=4.0                     //ohm
+
+//Calculation
+Rab=1/((1/R1)+(1/R2))
+
+//Result
+printf("\n The equivalent resisatance is  %0.3f  ohm", Rab)
diff --git a/3769/CH5/EX5.29/Ex5_29.sce b/3769/CH5/EX5.29/Ex5_29.sce
new file mode 100644
index 000000000..1c275077d
--- /dev/null
+++ b/3769/CH5/EX5.29/Ex5_29.sce
@@ -0,0 +1,10 @@
+clear
+//Given
+R1=15                    //ohm
+R2=30                   //ohm
+
+//Calculation
+R=R1*R2/(R1+R2)
+
+//Result
+printf("\n The equivqlent resistance between A and B is  %0.3f  ohm", R)
diff --git a/3769/CH5/EX5.3/Ex5_3.sce b/3769/CH5/EX5.3/Ex5_3.sce
new file mode 100644
index 000000000..466865f28
--- /dev/null
+++ b/3769/CH5/EX5.3/Ex5_3.sce
@@ -0,0 +1,11 @@
+clear
+//Given
+e=1.6*10**-19                  //C
+f=6.8*10**15                   //rev/sec
+r=0.51*10**-10                  //m
+
+//Calculation
+I=e*f
+
+//Result
+printf("\n The equivalent current is  %0.3f  *10**-3 A", I*10**3)
diff --git a/3769/CH5/EX5.31/Ex5_31.sce b/3769/CH5/EX5.31/Ex5_31.sce
new file mode 100644
index 000000000..010ce40cc
--- /dev/null
+++ b/3769/CH5/EX5.31/Ex5_31.sce
@@ -0,0 +1,20 @@
+clear
+//Given
+R1=5                 //ohm
+R2=9                  //ohm
+R3=14                  //ohm
+R4=11
+R5=7
+R6=18
+R7=13
+R8=22
+V=22
+
+//Calculation
+Rec=(R1+R2)*R3/(R1+R2+R3)
+Rbe=(R4+R5)*R6/(R4+R5+R6)
+Rae=(R7+R2)*R8/(R7+R2+R8)
+I=V/Rae
+
+//Result
+printf("\n The value of current in the branch AF is  %0.3f  A", I)
diff --git a/3769/CH5/EX5.32/Ex5_32.sce b/3769/CH5/EX5.32/Ex5_32.sce
new file mode 100644
index 000000000..0bcdadeb5
--- /dev/null
+++ b/3769/CH5/EX5.32/Ex5_32.sce
@@ -0,0 +1,12 @@
+clear
+//Given
+R1=12                     //ohm
+R2=6                      //ohm
+
+//Calculation
+Rdg=R1*R2/(R1+R2)
+Rch=R1*R2/(R1+R2)
+Rab=Rdg+Rch
+
+//Result
+printf("\n The equivalent resistance is  %0.3f  ohm", Rab)
diff --git a/3769/CH5/EX5.33/Ex5_33.sce b/3769/CH5/EX5.33/Ex5_33.sce
new file mode 100644
index 000000000..a6a783283
--- /dev/null
+++ b/3769/CH5/EX5.33/Ex5_33.sce
@@ -0,0 +1,20 @@
+clear
+//Given
+Rab=500.0                      //ohm
+Rl=500                        //ohm
+Rbc=1500                      //ohm
+E=50                          //Volts
+Rac=2000.0                      //ohm
+V=40
+
+//Calculation
+R=Rbc*Rl/(Rbc+Rl)
+I=E/(Rab+R)
+Pd=I*Rab
+Rl1=E-Pd
+I1=E/Rac
+R12=V/I1
+
+//Result
+printf("\n (i) Potential difference across the road is  %0.2f  V",Rl1)
+printf("\n (ii) Resistance at BC is  %0.3f  ohm", R12)
diff --git a/3769/CH5/EX5.35/Ex5_35.sce b/3769/CH5/EX5.35/Ex5_35.sce
new file mode 100644
index 000000000..a7adc253e
--- /dev/null
+++ b/3769/CH5/EX5.35/Ex5_35.sce
@@ -0,0 +1,11 @@
+clear
+//Given
+R1=5                        //ohm
+R2=5.0                       //ohm
+R=6
+
+//Calculation
+n=(1/(R-R1)*R2)
+
+//Result
+printf("\n There are %0.3f  resistance are in parallel", n)
diff --git a/3769/CH5/EX5.36/Ex5_36.sce b/3769/CH5/EX5.36/Ex5_36.sce
new file mode 100644
index 000000000..603046ddc
--- /dev/null
+++ b/3769/CH5/EX5.36/Ex5_36.sce
@@ -0,0 +1,12 @@
+clear
+//Given
+R1=20.0                       //ohm
+R2=10.0                        //ohm
+R4=10
+
+//Calculation
+Rbd=(R1*R2)/(R1+R2)
+Rae=R2+Rbd+R4
+
+//Result
+printf("\n The value of resistance is  %0.2f  ohm",Rae)
diff --git a/3769/CH5/EX5.37/Ex5_37.sce b/3769/CH5/EX5.37/Ex5_37.sce
new file mode 100644
index 000000000..27d4906c9
--- /dev/null
+++ b/3769/CH5/EX5.37/Ex5_37.sce
@@ -0,0 +1,16 @@
+clear
+//Given
+R1=2.0                     //ohm
+R2=3                         //ohm
+R3=2.8
+E=6                              //V
+
+//Calculation
+Rab=R1*R2/(R1+R2)
+Rt=Rab+R3
+I=E/Rt
+Vab=I*Rab
+I1=Vab/2.0
+
+//Result
+printf("\n The steady state current is  %0.3f  A", I1)
diff --git a/3769/CH5/EX5.38/Ex5_38.sce b/3769/CH5/EX5.38/Ex5_38.sce
new file mode 100644
index 000000000..ccc9ed740
--- /dev/null
+++ b/3769/CH5/EX5.38/Ex5_38.sce
@@ -0,0 +1,14 @@
+clear
+//Given
+R1=3                 //ohm
+R2=3
+R3=6
+
+//Calculation
+Rad=(R1+R2)*R3/(R1+R2+R3)
+Rae=(Rad+R1)*R3/(Rad+R1+R3)
+Raf=(Rae+R1)*R3/(Rae+R1+R3)
+Rab=(Raf+R1)*R2/(Rae+R1+R2)
+
+//Result
+printf("\n the effective resistance between the point A and B is %0.3f  Ohm", Rab)
diff --git a/3769/CH5/EX5.39/Ex5_39.sce b/3769/CH5/EX5.39/Ex5_39.sce
new file mode 100644
index 000000000..8555b385e
--- /dev/null
+++ b/3769/CH5/EX5.39/Ex5_39.sce
@@ -0,0 +1,23 @@
+clear
+//Given
+R2=50.0                     //ohm
+R3=50.0                       //ohm
+R4=75.0                       //ohm
+E=4.75
+R1=100
+
+//Calculation
+Rbc=1/((1/R2)+(1/R3)+(1/R4))
+R=R1+Rbc
+I=E/R
+R11=I*R1
+Vbc=E-(I*R1)
+I2=Vbc/R2
+I3=Vbc/R3
+I4=Vbc/R4
+
+//Result
+printf("\n Equivalent resistance of the circuit is  %0.3f  ohm", R)
+printf("\n Current in R2 is %0.3f  A",I2)
+printf("\n Current in R3 is %0.3f  A",I3)
+printf("\n Current in R4 is %0.3f  A",I4)
diff --git a/3769/CH5/EX5.40/Ex5_40.sce b/3769/CH5/EX5.40/Ex5_40.sce
new file mode 100644
index 000000000..6f82d91fa
--- /dev/null
+++ b/3769/CH5/EX5.40/Ex5_40.sce
@@ -0,0 +1,12 @@
+clear
+//Given
+V=19
+I1=0.5
+I2=2                       //A
+r=2                         
+
+//Calculation
+E=V+I1*r
+
+//Result
+printf("\n E.M.F is  %0.3f  V", E)
diff --git a/3769/CH5/EX5.41/Ex5_41.sce b/3769/CH5/EX5.41/Ex5_41.sce
new file mode 100644
index 000000000..e61913fed
--- /dev/null
+++ b/3769/CH5/EX5.41/Ex5_41.sce
@@ -0,0 +1,19 @@
+clear
+//Given
+V=1.5
+a=1.5
+r1=0.5                     //ohm
+r2=0.25
+R=2.25                      //ohm
+
+//Calculation
+E=V+a
+r=r1+r2
+Rt=r+R
+I=E/Rt
+pd=V-(I*r1)
+pd1=V-(I*r2)
+
+//Result
+printf("\n (i) The circuit current is  %0.3f  A",I)
+printf("\n (ii) P.D across the terminals of each  cell is  %0.3f V and  %0.3f V",pd,pd1)
diff --git a/3769/CH5/EX5.42/Ex5_42.sce b/3769/CH5/EX5.42/Ex5_42.sce
new file mode 100644
index 000000000..42e2d119a
--- /dev/null
+++ b/3769/CH5/EX5.42/Ex5_42.sce
@@ -0,0 +1,18 @@
+clear
+//Given
+n=10
+E=1.5
+R=4                     //ohm
+r=0.1
+a=8
+
+//Calculation
+Emf=n*E
+Rt=R+(n*r)
+I=Emf/Rt
+Emf1=(a*E)-(2*E)
+I1=Emf1/Rt
+I11=I-I1
+
+//Result
+printf("\n Reduction in current is  %0.3f  A", I11)
diff --git a/3769/CH5/EX5.43/Ex5_43.sce b/3769/CH5/EX5.43/Ex5_43.sce
new file mode 100644
index 000000000..90c41c48f
--- /dev/null
+++ b/3769/CH5/EX5.43/Ex5_43.sce
@@ -0,0 +1,18 @@
+clear
+//Given
+Emf=2
+Emf1=1.9
+Emf2=1.8
+R1=0.05
+R2=0.06
+R3=0.07
+R0=5                   //ohm
+
+//Calculation
+Emft=Emf+Emf1+Emf2
+R=R1+R2+R3
+Rt=R+R0
+I=Emft/Rt
+
+//Result
+printf("\n The reading of the ammeter is  %0.1f  A",I)
diff --git a/3769/CH5/EX5.44/Ex5_44.sce b/3769/CH5/EX5.44/Ex5_44.sce
new file mode 100644
index 000000000..262efdcac
--- /dev/null
+++ b/3769/CH5/EX5.44/Ex5_44.sce
@@ -0,0 +1,19 @@
+clear
+//Given
+R1=6.0                //ohm
+R2=3
+I=0.8                  //A
+a=24
+
+//Calculation
+I1=I*(R1+R2)/R1
+I11=I1-I
+Rp=R1*R2/(R1+R2)
+Rt=Rp+8
+r=(a/I1)-10
+V=I1*Rt
+
+//Result
+printf("\n (i) Current in 6 ohm resistance is  %0.3f  A", I11)
+printf("\n (ii) Internal resistance of the battery is  %0.3f  ohm", r)
+printf("\n (iii) The terminal potential difference of the battery is  %0.3f  V", V)
diff --git a/3769/CH5/EX5.45/Ex5_45.sce b/3769/CH5/EX5.45/Ex5_45.sce
new file mode 100644
index 000000000..8d60e346c
--- /dev/null
+++ b/3769/CH5/EX5.45/Ex5_45.sce
@@ -0,0 +1,15 @@
+clear
+//Given
+R1=2               //ohm
+R2=4
+R3=6
+E=8
+r=1
+
+//Calculation
+Rac=(R1+R2)*R3/(R1+R2+R3)
+I=E/(Rac+r)
+I1=I/2.0
+
+//Result
+printf("\n Internal resistance is  %0.3f  A", I1)
diff --git a/3769/CH5/EX5.46/Ex5_46.sce b/3769/CH5/EX5.46/Ex5_46.sce
new file mode 100644
index 000000000..fc600bbdf
--- /dev/null
+++ b/3769/CH5/EX5.46/Ex5_46.sce
@@ -0,0 +1,8 @@
+clear
+//Given
+E=1
+R=2
+
+//Calculation
+r=(E*R)-E
+printf("\n The internal resisatnce of aech cell is  %0.3f  ohm",r)
diff --git a/3769/CH5/EX5.47/Ex5_47.sce b/3769/CH5/EX5.47/Ex5_47.sce
new file mode 100644
index 000000000..71127c13c
--- /dev/null
+++ b/3769/CH5/EX5.47/Ex5_47.sce
@@ -0,0 +1,13 @@
+clear
+//Given
+R1=15.0                          // ohm
+R2=15.0
+E=2
+V=1.6
+
+//Calculation
+R=R1*R2/(R1+R2)
+r=((E/V)-1)*R*4
+
+//Result
+printf("\n Internal resisatnce of each cell is  %0.3f  ohm", r)
diff --git a/3769/CH5/EX5.48/Ex5_48.sce b/3769/CH5/EX5.48/Ex5_48.sce
new file mode 100644
index 000000000..1c3ae0d3d
--- /dev/null
+++ b/3769/CH5/EX5.48/Ex5_48.sce
@@ -0,0 +1,14 @@
+clear
+//Given
+I1=1                     //A
+E=1.5
+I2=0.6
+R2=2.33                       //ohm
+
+//Calculation
+R=2*E/I1
+R1=2*E/I2
+r=R1-2*R2
+
+//Result
+printf("\n Internal resisatnce of each battery is  %0.3f  ohm", r)
diff --git a/3769/CH5/EX5.49/Ex5_49.sce b/3769/CH5/EX5.49/Ex5_49.sce
new file mode 100644
index 000000000..2d46542b8
--- /dev/null
+++ b/3769/CH5/EX5.49/Ex5_49.sce
@@ -0,0 +1,25 @@
+clear
+//Given
+R1=4                   //ohm
+R2=4                            //ohm
+R3=12
+R4=6.0
+E=16
+r=1                         //ohm
+
+//calculation
+Rab=R1*R2/(R1+R2)
+Rcd=R3*R4/(R3+R4)
+R=Rab+Rcd+1
+I=E/(R+r)
+I1=I/2.0
+I3=I*R4/(R3+R4)
+I4=I*R3/(R3+R4)
+Vab=4*I1
+Vbc=I*1
+Vcd=12*I3
+
+//Result
+printf("\n (i) equivalent resistance of the network is  %0.3f  ohm", R)
+printf("\n (ii) Circuit current is %0.3f A , Current in R1 is %0.3f A , Current in R3 is %0.2f A , Current in R4 is  %0.2f ",I,I1,I3,I4)
+printf("\n Voltage drop Vab is %0.3f V \nVbc is %0.3f V \nVcd is %0.3f V",Vab,Vbc,Vcd)
diff --git a/3769/CH5/EX5.5/Ex5_5.sce b/3769/CH5/EX5.5/Ex5_5.sce
new file mode 100644
index 000000000..12cbee457
--- /dev/null
+++ b/3769/CH5/EX5.5/Ex5_5.sce
@@ -0,0 +1,12 @@
+clear
+//Given
+I=10              //A
+A=1               //m*m**2
+e=1.6*10**-19         //C
+n=10**28              //m**-3
+
+//Calculation
+Vd=I/(n*A*e)
+
+//Result
+printf("\n Drift velocity of the conduction electrons are  %0.3f  m/s", Vd)
diff --git a/3769/CH5/EX5.6/Ex5_6.sce b/3769/CH5/EX5.6/Ex5_6.sce
new file mode 100644
index 000000000..bacf3d468
--- /dev/null
+++ b/3769/CH5/EX5.6/Ex5_6.sce
@@ -0,0 +1,14 @@
+clear
+//Given
+I=10                //A
+A=4*10**-6                 //m**2
+e=1.6*10**-19                //C
+n=8*10**28                     //m**-3
+l=4
+
+//Calculation
+Vd=I/(n*A*e)
+t=l/Vd
+
+//Result
+printf("\n Time required by an electron is  %0.3f  *10**4 S", t*10**-4)
diff --git a/3769/CH5/EX5.7/Ex5_7.sce b/3769/CH5/EX5.7/Ex5_7.sce
new file mode 100644
index 000000000..d9dc32885
--- /dev/null
+++ b/3769/CH5/EX5.7/Ex5_7.sce
@@ -0,0 +1,24 @@
+clear
+//Given
+a=6.023*10**23
+m=63.5*10**-3
+d=9*10**3
+A=10**-7                   //m**2
+e=1.6*10**-19                   //C
+I=1.5                           //a
+K=1.38*10**-23                 //J/K
+T=300                           //K
+Vd=1.1*10**-3
+C=3*10**8
+
+//Calculation
+//
+n=a*d/m
+Vd=I/(n*A*e)
+V=sqrt((3*K*T*a)/m)
+V1=Vd/V
+E=Vd/C
+
+//Result
+printf("\n (i) Thermal speeds of copper atoms at ordinary temperatures are  %0.2f  *10**-6 m/s",V1*10**6)
+printf("\n (ii) Speed of propagation of electric fild is  %0.1f *10**-12 ",E*10**12)
diff --git a/3769/CH5/EX5.8/Ex5_8.sce b/3769/CH5/EX5.8/Ex5_8.sce
new file mode 100644
index 000000000..b909daa39
--- /dev/null
+++ b/3769/CH5/EX5.8/Ex5_8.sce
@@ -0,0 +1,12 @@
+clear
+//Given
+V=5
+l=0.1
+Vd=2.5*10**-4
+
+//Calculation
+E=V/l
+u=Vd/E
+
+//Result
+printf("\n The electron mobility is  %0.3f  m**2/V/C", u)
diff --git a/3769/CH5/EX5.9/Ex5_9.sce b/3769/CH5/EX5.9/Ex5_9.sce
new file mode 100644
index 000000000..7048fe8bd
--- /dev/null
+++ b/3769/CH5/EX5.9/Ex5_9.sce
@@ -0,0 +1,15 @@
+clear
+//Given
+I=2.4
+A=0.30*10**-6
+m=9.1*10**-31
+n=8.4*10**28
+e=1.6*10**-19
+E=7.5
+
+//Calculation
+J=I/A
+t=m*J/(n*e**2*E)
+
+//Result
+printf("\n Average relaxation time is  %0.2f *10**-16 S",t*10**16)