diff options
Diffstat (limited to '1694/CH6')
| -rw-r--r-- | 1694/CH6/EX6.1/Ex6_1.sce | 25 | ||||
| -rw-r--r-- | 1694/CH6/EX6.10/Ex6_10.sce | 14 | ||||
| -rw-r--r-- | 1694/CH6/EX6.11/Ex6_11.sce | 19 | ||||
| -rw-r--r-- | 1694/CH6/EX6.12/Ex6_12.sce | 18 | ||||
| -rw-r--r-- | 1694/CH6/EX6.13/Ex6_13.sce | 13 | ||||
| -rw-r--r-- | 1694/CH6/EX6.14/Ex6_14.sce | 19 | ||||
| -rw-r--r-- | 1694/CH6/EX6.15/Ex6_15.sce | 24 | ||||
| -rw-r--r-- | 1694/CH6/EX6.16/Ex6_16.sce | 20 | ||||
| -rw-r--r-- | 1694/CH6/EX6.17/Ex6_17.sce | 13 | ||||
| -rw-r--r-- | 1694/CH6/EX6.18/Ex6_18.sce | 17 | ||||
| -rw-r--r-- | 1694/CH6/EX6.19/Ex6_19.sce | 19 | ||||
| -rw-r--r-- | 1694/CH6/EX6.2/Ex6_2.sce | 18 | ||||
| -rw-r--r-- | 1694/CH6/EX6.20/Ex6_20.sce | 18 | ||||
| -rw-r--r-- | 1694/CH6/EX6.22/Ex6_22.sce | 18 | ||||
| -rw-r--r-- | 1694/CH6/EX6.24/Ex6_24.sce | 23 | ||||
| -rw-r--r-- | 1694/CH6/EX6.26/Ex6_26.sce | 12 | ||||
| -rw-r--r-- | 1694/CH6/EX6.3/Ex6_3.sce | 12 | ||||
| -rw-r--r-- | 1694/CH6/EX6.4/Ex6_4.sce | 12 | ||||
| -rw-r--r-- | 1694/CH6/EX6.5/Ex6_5.sce | 23 | ||||
| -rw-r--r-- | 1694/CH6/EX6.6/Ex6_6.sce | 14 | ||||
| -rw-r--r-- | 1694/CH6/EX6.9/Ex6_9.sce | 15 |
21 files changed, 366 insertions, 0 deletions
diff --git a/1694/CH6/EX6.1/Ex6_1.sce b/1694/CH6/EX6.1/Ex6_1.sce new file mode 100644 index 000000000..2567c628b --- /dev/null +++ b/1694/CH6/EX6.1/Ex6_1.sce @@ -0,0 +1,25 @@ +clear;
+clc;
+printf("\nEx-6.1\n");
+//page no.-178
+//given
+sigma=6.2*10^-7;......//conductivity of silver in ohm-m
+
+n=5.8*10^28;..........//no. of free electrons per unit volume in m^3
+
+m=9.1*10^-31;.........//mass of electron in kg
+
+e=1.6*10^-19;.........//elementary charge in coulamb
+
+tau=(sigma*m)/(e^2*n).....//relaxation time
+
+printf("\nthe relaxation time is 3.8*10^-14 s\n");
+
+l=2;......//length of silver wire in m
+v=40;.....//potential diff. in V
+
+E=v/l.....//electric field in wire in V/m
+
+vd=-(e*E*tau)/m......//drift speed of electron
+
+printf("\ndrift speed of electron is -0.13 m/s");
diff --git a/1694/CH6/EX6.10/Ex6_10.sce b/1694/CH6/EX6.10/Ex6_10.sce new file mode 100644 index 000000000..1a6b9249f --- /dev/null +++ b/1694/CH6/EX6.10/Ex6_10.sce @@ -0,0 +1,14 @@ +clear;
+clc;
+printf("\nEx-6.10\n");
+//page no.-188
+//given
+no=8.48*10^28;......//free electrons/m^3
+
+m=9.1*10^-31;....//mass of electron
+
+h=6.62*10^-34;....//planck's constant in Js
+
+E=(3*no/%pi)^(2/3)*(h^2)/(8*m*e)......//fermi energy in eV
+
+printf("\nfermi energy in copper is 7.04 eV");
diff --git a/1694/CH6/EX6.11/Ex6_11.sce b/1694/CH6/EX6.11/Ex6_11.sce new file mode 100644 index 000000000..0937a5704 --- /dev/null +++ b/1694/CH6/EX6.11/Ex6_11.sce @@ -0,0 +1,19 @@ +clear;
+clc;
+printf("\nEx-6.11\n");
+//page no.-189
+//given
+I=15;............//current in A
+A=2.1*10^-6;.....//area in m^2
+rho=8.95*10^3;...//density in Kg/m^3
+M=63.5;..........//mass in g/mol
+N=6.02*10^23;....//avagadro no.
+e=1.6*10^-19;....//charge in J
+
+no=N*rho/M........//no. of free electrons per unit vol.
+
+printf("\nno. of free e/unit vol is 8.48*10^28 electrons/m^3\n");
+v=I/(no*A*e)......//drift velocity of e
+
+printf("\ndrift velocity of e is5.3*10^-4");
+
diff --git a/1694/CH6/EX6.12/Ex6_12.sce b/1694/CH6/EX6.12/Ex6_12.sce new file mode 100644 index 000000000..487746d0e --- /dev/null +++ b/1694/CH6/EX6.12/Ex6_12.sce @@ -0,0 +1,18 @@ +clear;
+clc;
+printf("\nEx-6.12\n");
+//page no.-189
+//given
+rho=1.42*10^-8;.....//resistivity of wire in ohm m
+E=0.14;.............//electric field in V/m
+n0=6*10^28;.........//no. of electrons per unit vol
+m=9.11*10^-31;......//mass of e in kg
+e=1.6*10^-19;......//charge in C
+
+tau=(m)/no*e^2*rho.........//mean collission time in s
+
+printf("\nmean collission time is 4.236*10^-14 s\n");
+
+v=((e*E)/m)*tau.........//avg drift velocity in m/s
+
+printf("\navg. drift velocity is 1.04*10^-3 m/s");
diff --git a/1694/CH6/EX6.13/Ex6_13.sce b/1694/CH6/EX6.13/Ex6_13.sce new file mode 100644 index 000000000..8e6491c31 --- /dev/null +++ b/1694/CH6/EX6.13/Ex6_13.sce @@ -0,0 +1,13 @@ +clear;
+clc;
+printf("\nEx-6.13\n");
+//page no.-190
+//given
+A=10^-6;.......//cross-sectional area in m^2
+I=1;..........//current in Ampere
+n0=8.5*10^28;.........//no. of electrons per unit vol
+e=1.6*10^-19;......//charge in C
+
+v=I/(no*A*e)...........//drift velocity in m/s
+
+printf("\ndrift velocity of free e is7.4*10^-4 m/s");
diff --git a/1694/CH6/EX6.14/Ex6_14.sce b/1694/CH6/EX6.14/Ex6_14.sce new file mode 100644 index 000000000..822069048 --- /dev/null +++ b/1694/CH6/EX6.14/Ex6_14.sce @@ -0,0 +1,19 @@ +clear;
+clc;
+printf("\nEx-6.14\n");
+//page no.-190
+//given
+v=10^6;.......//avg velocity in m.s
+rho=1.673*10^-8;..//resistivity in ohm m
+n0=8.48*10^28;.........//no. of electrons per unit vol
+e=1.6*10^-19;......//charge in C
+m=9.11*10^-31;......//mass of e in kg
+
+tau=m/(no*e^2*rho)........//mean collission time in s
+
+printf("\nmean collision time is 2.51*10^-14 s\n");
+
+lambda=v*tau............//mean free path in m
+
+printf("\nmean free path 2.51*10^-8 m");
+
diff --git a/1694/CH6/EX6.15/Ex6_15.sce b/1694/CH6/EX6.15/Ex6_15.sce new file mode 100644 index 000000000..003a04f9a --- /dev/null +++ b/1694/CH6/EX6.15/Ex6_15.sce @@ -0,0 +1,24 @@ +clear;
+clc;
+printf("\nEx-6.15\n");
+//page no.-190
+//given
+l=3;........//length of wire in m
+R=0.022;....//resistance in ohm
+I=15;.......//current in A
+mu=4.3*10^-3;..//mobility in m^2/Vs
+m=9.11*10^-31;....//mass
+V=I*R........//voltage drop across Cu wire in Volt
+
+E=V/l........//electric field in V/m
+
+v=E*mu.......//drift velocity in m/s
+
+printf("\ndrift velocity is 0.473*10^-3 m/s\n");
+k=1.387*10^-23;.......//boltzmann constant
+T=300;................//temperature in kelvin
+
+vo=((3*k*T)/m)^(1/2)....//thermal velocity
+
+printf("\nthermal velocity is 1.17*10^5 m/s");
+
diff --git a/1694/CH6/EX6.16/Ex6_16.sce b/1694/CH6/EX6.16/Ex6_16.sce new file mode 100644 index 000000000..c1e7afbac --- /dev/null +++ b/1694/CH6/EX6.16/Ex6_16.sce @@ -0,0 +1,20 @@ +clear;
+clc;
+printf("\nEx-6.16\n");
+//page no.-191
+//given
+rho=1.54*10^-8;.......//resistivity in ohm m
+E=100;...............//electric field in V/m
+no=5.8*10^28;.........//no of free electrons per unit vol
+m=9.11*10^-31;....//mass
+e=1.6*10^-19;......//charge in C
+
+tau=m/(no*e^2*rho)........//mean collision time
+
+printf("\nmean collision time is 3.98*10^-14 s\n");
+v=((e*E)/m)*tau........//drift velocity
+
+printf("\ndrift velocity is 0.7 m/s\n");
+mu=v/E.........//mobility
+
+printf("\nmobility is 7*10^-3 m^2/Vs");
diff --git a/1694/CH6/EX6.17/Ex6_17.sce b/1694/CH6/EX6.17/Ex6_17.sce new file mode 100644 index 000000000..b8a075987 --- /dev/null +++ b/1694/CH6/EX6.17/Ex6_17.sce @@ -0,0 +1,13 @@ +clear;
+clc;
+printf("\nEx-6.17\n");
+//page no.-191
+//given
+rho=1.54*10^-8;......//resistivity in ohm m
+no=5.8*10^28;.........//no of free electrons per unit vol
+m=9.11*10^-31;....//mass
+e=1.6*10^-19;......//charge in C
+
+tau=m/(no*e^2*rho)....//relaxation time
+
+printf("\nrelaxation time is 3.97*10^-14 s\n");
diff --git a/1694/CH6/EX6.18/Ex6_18.sce b/1694/CH6/EX6.18/Ex6_18.sce new file mode 100644 index 000000000..20f35b33f --- /dev/null +++ b/1694/CH6/EX6.18/Ex6_18.sce @@ -0,0 +1,17 @@ +clear;
+clc;
+printf("\nEx-6.18\n");
+//page no.-192
+//given
+T=0;........//temperature in kelvin
+rho=10500;....//density of Ag in Kg/m^3
+M=107.9;......//atomic weight
+N=6.025*10^26;....//avagadro no.
+e=1.6*10^-19;.....//charge
+h=6.63*10^-34;....//planck's constant in Js
+
+no=(N*rho)/M......//no of free electrons per unit vol
+
+E=(3*no/%pi)^(2/3)*(h^2)/(8*m*e)......//fermi energy in eV
+
+printf("\nfermi energy is 5.518 eV");
diff --git a/1694/CH6/EX6.19/Ex6_19.sce b/1694/CH6/EX6.19/Ex6_19.sce new file mode 100644 index 000000000..ff50973b9 --- /dev/null +++ b/1694/CH6/EX6.19/Ex6_19.sce @@ -0,0 +1,19 @@ +clear;
+clc;
+printf("\nEx-6.19\n");
+//page no.-192
+//given
+E=5.53;......//fermi energy in eV
+e=1.6*10^-19;.....//charge
+tau=3.91*10^-14;..//relaxation time in s
+m=9.11*10^-31;....//mass of electron
+
+v=((2*E*e)/m)^(1/2).......//fermi velocity
+
+printf("\nfermi velocity is 1.39*10^6 m/s\n");
+
+k=1.38*10^-23;......//boltzmann constant
+
+T=(E*e)/k..............//fermi temperature in kelvin
+
+printf("\nfermi temperature is 6.41*10^4 k");
diff --git a/1694/CH6/EX6.2/Ex6_2.sce b/1694/CH6/EX6.2/Ex6_2.sce new file mode 100644 index 000000000..31bced25d --- /dev/null +++ b/1694/CH6/EX6.2/Ex6_2.sce @@ -0,0 +1,18 @@ +clear;
+clc;
+printf("\nEx-6.2\n");
+//page no.-184
+//given
+no=5.8*10^28;......//free electrons per m^3
+e=1.6*10^-19;......//charge in C
+h= 1.05*10^-34;.....//planck's constant in Js
+
+m=9.1*10^-31;.......//mass of electron in kg
+
+E=(3*no*%pi^2)^(2/3)*(h^2)/(2*m*e)......//fermi energy of electron
+
+printf("\nfermi energy of electron is 5.4 eV\n");
+
+v=((2*E)/m)^(1/2);......//speed of electron in m/s
+
+printf("\nspeed of electron is 1.4*10^6 m/s");
diff --git a/1694/CH6/EX6.20/Ex6_20.sce b/1694/CH6/EX6.20/Ex6_20.sce new file mode 100644 index 000000000..3130e5a66 --- /dev/null +++ b/1694/CH6/EX6.20/Ex6_20.sce @@ -0,0 +1,18 @@ +clear;
+clc;
+printf("\nEx-6.20\n");
+//page no.-192
+//given
+rho=1.7*10^-8;......//resistivity in ohm m
+M=63.54;...........//atomic weight
+d=8.96*10^3;......//density in Kg/m^3
+N=6.025*10^23;......//avagadro no.
+e=1.6*10^-19;.......//charge
+
+no=(N*d)/M........//no of electrons per unit volume
+
+printf("\nno. of electrons/ unit volume 8.50*10^28 /m^3\n");
+
+mu=(1)/(rho*e*no).......//mobility in m/Vs
+
+printf("\nmobility is 4.35*10^-3 m/Vs");
diff --git a/1694/CH6/EX6.22/Ex6_22.sce b/1694/CH6/EX6.22/Ex6_22.sce new file mode 100644 index 000000000..8cd48fd48 --- /dev/null +++ b/1694/CH6/EX6.22/Ex6_22.sce @@ -0,0 +1,18 @@ +clear;
+clc;
+printf("\nEx-6.22\n");
+//page no.-193
+//given
+g=18.8;.......//specific gravity
+M=184;.......//atomic weight
+n=2;.........//no of electrons per atom
+N=6.02*10^23;......//avagadro no.
+e=1.6*10^-19;.......//charge
+
+no=(N*g*n)*10^6/M........//no of electrons per unit volume
+
+printf("\nno. of electrons/ unit volume 1.23*10^29 /m^3\n");
+
+E=((3.64*10^-19)/e)*(no^(2/3)).......//fermi energy
+
+printf("\nfermi energy is 9 eV");
diff --git a/1694/CH6/EX6.24/Ex6_24.sce b/1694/CH6/EX6.24/Ex6_24.sce new file mode 100644 index 000000000..6d0152e1c --- /dev/null +++ b/1694/CH6/EX6.24/Ex6_24.sce @@ -0,0 +1,23 @@ +clear;
+clc;
+printf("\nEx-6.24\n");
+//page no.-195
+//given
+rho=1.73*10^-8;......//resistivity in ohm m
+M=63.5;...........//atomic weight
+d=8.92*10^3;......//density in Kg/m^3
+N=6.023*10^23;......//avagadro no.
+e=1.6*10^-19;.......//charge
+m=9.11*10^-31;......//mass of e
+
+no=(N*d)/M........//no of electrons per unit volume
+
+printf("\nno. of electrons/ unit volume 8.463*10^25 /m^3\n");
+
+mu=1/(rho*no*e).........//mobility
+
+printf("\nmobility is 4.1145 m^2/Vs\n");
+
+tau=m/(no*e^2*rho)..........//relaxation time
+
+printf("\nrelaxation time is 2.25*10^-11 s");
diff --git a/1694/CH6/EX6.26/Ex6_26.sce b/1694/CH6/EX6.26/Ex6_26.sce new file mode 100644 index 000000000..1cf06a471 --- /dev/null +++ b/1694/CH6/EX6.26/Ex6_26.sce @@ -0,0 +1,12 @@ +clear;
+clc;
+printf("\nEx-6.26\n");
+//page no.-195
+//given
+E=2.1;........//fermi energy in eV
+e=1.6*10^-19;.......//charge
+m=9.11*10^-31;......//mass of e
+
+v=((2*E*e)/m)^(1/2)........//fermi velocity in m/s
+
+printf("\nfermi velocity is 8.6*10^5 m/s");
diff --git a/1694/CH6/EX6.3/Ex6_3.sce b/1694/CH6/EX6.3/Ex6_3.sce new file mode 100644 index 000000000..e9e438de3 --- /dev/null +++ b/1694/CH6/EX6.3/Ex6_3.sce @@ -0,0 +1,12 @@ +clear;
+clc;
+printf("\nEx-6.3\n");
+//page no.-185
+//given
+no=5.9*10^28;.....//free electrons per m^3
+m=9.1*10^-31;....//mass of electron
+h=6.6*10^-34;....//planck's constant in Js
+
+E=(3*no/%pi)^(2/3)*(h^2)/(8*m*e)......//fermi energy in joule
+
+printf("\nfermi energy is 5.4 eV\n");
diff --git a/1694/CH6/EX6.4/Ex6_4.sce b/1694/CH6/EX6.4/Ex6_4.sce new file mode 100644 index 000000000..7a0c118f7 --- /dev/null +++ b/1694/CH6/EX6.4/Ex6_4.sce @@ -0,0 +1,12 @@ +clear;
+clc;
+printf("\nEx-6.4\n");
+//page no.-185
+//given
+E=16.02*10^-19......//fermi energy in coulamb
+
+k=1.381*10^-23......//boltzmann constant in m
+
+T=(2*E)/(5*k)...........//temperature in kelvin
+
+printf("\nclassical temperature is 4.64*10^4 k");
diff --git a/1694/CH6/EX6.5/Ex6_5.sce b/1694/CH6/EX6.5/Ex6_5.sce new file mode 100644 index 000000000..748d4e9aa --- /dev/null +++ b/1694/CH6/EX6.5/Ex6_5.sce @@ -0,0 +1,23 @@ +clear;
+clc;
+printf("\nEx-6.5\n");
+//page no.-185
+//given
+n0=2.5*10^28;.....//no. of free e per unit volume of metal
+e=1.6*10^-19;......//charge in C
+m=9.1*10^-31;....//mass of electron
+
+h=6.62*10^-34;....//planck's constant in Js
+
+E=(3*no/%pi)^(2/3)*(h^2)/(8*m)......//fermi energy in J
+//to convert in eV divide by charge e i.e. 1.6*10^-19
+printf("\nfermi energy is 3.1 eV\n");
+
+v=(2*E)/m^(1/2)......//fermi velocity in m/s
+
+printf("\nfermi velocity is 1.047 m/s\n");
+k=1.38*10^-23;.....//boltzmann constant
+
+T=E/k..............//fermi temperature in kelvin
+
+printf("\nfermi temperature 3.623*10^4 K");
diff --git a/1694/CH6/EX6.6/Ex6_6.sce b/1694/CH6/EX6.6/Ex6_6.sce new file mode 100644 index 000000000..9e4ed15d5 --- /dev/null +++ b/1694/CH6/EX6.6/Ex6_6.sce @@ -0,0 +1,14 @@ +clear;
+clc;
+printf("\nEx-6.6\n");
+//page no.-186
+//given
+no=2.54*10^28;.....//no. of free e per unit volume of metal
+
+m=9.1*10^-31;....//mass of electron
+
+h=6.62*10^-34;....//planck's constant in Js
+
+E=(3*no/%pi)^(2/3)*(h^2)/(8*m)......//fermi energy in J
+//to convert in eV divide by charge e i.e. 1.6*10^-19
+printf("\nfermi energy is 3.19 ev\n");
diff --git a/1694/CH6/EX6.9/Ex6_9.sce b/1694/CH6/EX6.9/Ex6_9.sce new file mode 100644 index 000000000..89da9bffc --- /dev/null +++ b/1694/CH6/EX6.9/Ex6_9.sce @@ -0,0 +1,15 @@ +clear;
+clc;
+printf("\nEx-6.9\n");
+//page no.-188
+//given
+no=2.54*10^28;.....//no. of free e per unit volume of sodium
+e=1.6*10^-19;......//charge in C
+m=9.1*10^-31;....//mass of electron
+
+h=6.625*10^-34;....//planck's constant in Js
+
+E=(3*no/%pi)^(2/3)*(h^2)/(8*m*e)......//fermi energy in eV
+//to convert in J multiply by charge e i.e. 1.6*10^-19
+
+printf("\nfermi energy is 3.19 eV");
|