removing problem statements

1 files changed, 0 insertions, 62 deletions

diff --git a/Electronic_Principles_/Chapter_6_New.ipynb b/Electronic_Principles_/Chapter_6_New.ipynb
index 6cc29f0f..990f6ef8 100644
--- a/Electronic_Principles_/Chapter_6_New.ipynb
+++ b/Electronic_Principles_/Chapter_6_New.ipynb
@@ -27,17 +27,12 @@
      "cell_type": "code",

      "collapsed": false,

      "input": [

-      "#Example 6.1.py\n",

-      "#A transistor has a collector current of 10 mA and a base current of 40 uA. find current gain. \n",

       "\n",

-      "#Variable declaration\n",

       "Ic=10                  #collector current(mA)\n",

       "Ib=40.0/1000.0         #base current (mA)\n",

       "\n",

-      "#Calculation\n",

       "Bdc=Ic/Ib            #Current gain\n",

       "\n",

-      "#Result\n",

       "print 'Current gain Bdc =',Bdc"

      ],

      "language": "python",

@@ -65,17 +60,12 @@
      "cell_type": "code",

      "collapsed": false,

      "input": [

-      "#Example 6.2.py\n",

-      "#A transistor has a currrent gain of 175 and a base current of 0.1 mA. find collector current. \n",

       "\n",

-      "#Variable declaration\n",

       "Bdc=175                #current gain\n",

       "Ib=0.1                 #base current (mA)\n",

       "\n",

-      "#Calculation\n",

       "Ic=Bdc*Ib            #Current gain\n",

       "\n",

-      "#Result\n",

       "print 'Collector current Ic =',Ic,'mA'"

      ],

      "language": "python",

@@ -103,17 +93,12 @@
      "cell_type": "code",

      "collapsed": false,

      "input": [

-      "#Example 6.3.py\n",

-      "#A transistor has a collector current of 2 mA. If the currrent gain of 135. find base current. \n",

       "\n",

-      "#Variable declaration\n",

       "Bdc=135.0              #current gain\n",

       "Ic=2.0                 #collector current (mA)\n",

       "\n",

-      "#Calculation\n",

       "Ib=(Ic/Bdc)*1000       #Current gain\n",

       "\n",

-      "#Result\n",

       "print 'Base current Ib =',round(Ib,2),'uA'"

      ],

      "language": "python",

@@ -141,21 +126,15 @@
      "cell_type": "code",

      "collapsed": false,

      "input": [

-      "#Example 6.4.py\n",

-      "#Use the second approx. to calculate the base current in figure 6-8b. \n",

-      "#Find voltage across the base resistor & collector current if Bdc=200. \n",

       "\n",

-      "#Variable declaration\n",

       "Vbb=2                  #base source voltage(V)\n",

       "Rb=100                 #base resistor (KOhm)\n",

       "Bdc=200                #current gain\n",

       "Vbe=0.7                #base-emitter voltage drop(V)\n",

       "\n",

-      "#Calculation\n",

       "Ib=((Vbb-Vbe)/Rb)*1000 #base current(uA)\n",

       "Ic=Bdc*Ib/1000         #Collector current(mA)\n",

       "\n",

-      "#Result\n",

       "print 'Base current Ib =',Ib,'uA'\n",

       "print 'Collector current Ic =',Ic,'mA'"

      ],

@@ -185,10 +164,7 @@
      "cell_type": "code",

      "collapsed": false,

      "input": [

-      "#Example 6.5.py\n",

-      "#The transistor of Figure 6-11a has Bdc=300. Calculate IB,IC,VCE & PD\n",

       "\n",

-      "#Variable declaration\n",

       "VBB=10                   #Base voltage (V)\n",

       "RC=2                     #Collector resistance(KOhm)\n",

       "VCC=10                   #collector voltage(V)\n",

@@ -196,13 +172,11 @@
       "RB=1                     #base resistance (MOhm)\n",

       "VBE=0.7                  #base-emitter voltage drop(V) \n",

       "\n",

-      "#Calculation\n",

       "IB=((VBB-VBE)/RB)          #base current(uA)\n",

       "IC=Bdc*IB/1000             #Collector current(mA)\n",

       "VCE=VCC-(IC*RC)            #Collector-emitter voltage(V)\n",

       "PD=VCE*IC                  #Collector power dissipation(W)\n",

       "\n",

-      "#Result\n",

       "print 'Base current IB =',IB,'uA'\n",

       "print 'Collector current IC =',IC,'mA'\n",

       "print 'Collector-emitter voltage VCE =',VCE,'V'\n",

@@ -236,10 +210,7 @@
      "cell_type": "code",

      "collapsed": false,

      "input": [

-      "#Example 6.6.py\n",

-      "#Calculate current gain of the 2N4424 shown in figure 6-12.\n",

       "\n",

-      "#Variable declaration\n",

       "VBB=10                   #Base voltage (V)\n",

       "RC=470                   #Collector resistance(Ohm)\n",

       "VCC=10                   #collector voltage(V)\n",

@@ -248,13 +219,11 @@
       "RB=330                   #base resistance (KOhm)\n",

       "VBE=0.7                  #base-emitter voltage drop \n",

       "\n",

-      "#Calculation\n",

       "IB=((VBB-VBE)/RB)*1000    #base current(uA)\n",

       "V=VCC-VCE                 #voltage across Rc\n",

       "IC=(V/RC)*1000            #Collector current(mA)\n",

       "Bdc=int((IC/IB)*1000)     #Collector-emitter voltage\n",

       "\n",

-      "#Result\n",

       "print 'Base current IB =',round(IB,2),'uA'\n",

       "print 'voltage across Rc VRc = ',round(V,2),'V'\n",

       "print 'Collector current IC =',round(IC,2),'mA'\n",

@@ -288,10 +257,7 @@
      "cell_type": "code",

      "collapsed": false,

      "input": [

-      "#Example 6.7.py\n",

-      "#What is the collector-emitter voltage in figure 6-14? Use the ideal transistor.\n",

       "\n",

-      "#Variable declaration\n",

       "VBB=15                   #Base voltage (V)\n",

       "RC=3.6                   #Collector resistance(KOhm)\n",

       "VCC=15                   #collector voltage(V)\n",

@@ -299,13 +265,11 @@
       "RB=470                   #base resistance (KOhm)\n",

       "VBE=0                    #base-emitter voltage drop(V) \n",

       "\n",

-      "#Calculation\n",

       "IB=((VBB-VBE)/float(RB))*1000     #base current(uA)\n",

       "IC=Bdc*IB/1000                    #Collector current(mA)\n",

       "VCE=VCC-(IC*RC)                   #Collector-emitter voltage(V)\n",

       "IE=IC+(IB/1000)                   #emitter current(mA)\n",

       "\n",

-      "#Result\n",

       "print 'Base current IB =',round(IB,2),'uA'\n",

       "print 'Collector current IC =',round(IC,2),'mA'\n",

       "print 'Collector-emitter voltage VCE = ',round(VCE,2),'V'\n",

@@ -339,10 +303,7 @@
      "cell_type": "code",

      "collapsed": false,

      "input": [

-      "#Example 6.8.py\n",

-      "#What is the collector-emitter voltage in figure 6-14? Use the second approximation.\n",

       "\n",

-      "#Variable declaration\n",

       "VBB=15                   #Base voltage (V)\n",

       "RC=3.6                   #Collector resistance(KOhm)\n",

       "VCC=15                   #collector voltage(V)\n",

@@ -350,12 +311,10 @@
       "RB=470                   #base resistance (KOhm)\n",

       "VBE=0.7                  #base-emitter voltage drop(V) \n",

       "\n",

-      "#Calculation\n",

       "IB=((VBB-VBE)/float(RB))*1000     #base current(uA)\n",

       "IC=Bdc*IB/1000                    #Collector current(mA)\n",

       "VCE=VCC-(IC*RC)                   #Collector-emitter voltage(V)\n",

       "\n",

-      "#Result\n",

       "print 'Base current IB =',round(IB,2),'uA'\n",

       "print 'Collector current IC =',round(IC,2),'mA'\n",

       "print 'Collector-emitter voltage VCE = ',round(VCE,2),'V'"

@@ -387,10 +346,7 @@
      "cell_type": "code",

      "collapsed": false,

      "input": [

-      "#Example 6.9.py\n",

-      "#suppose you measure a VBE 1V. What is the collector-emitter voltage in figure 6-14?\n",

       "\n",

-      "#Variable declaration\n",

       "VBB=15                   #Base voltage (V)\n",

       "RC=3.6                   #Collector resistance(KOhm)\n",

       "VCC=15                   #collector voltage(V)\n",

@@ -398,12 +354,10 @@
       "RB=470                   #base resistance (KOhm)\n",

       "VBE=1                    #base-emitter voltage drop(V) \n",

       "\n",

-      "#Calculation\n",

       "IB=((VBB-VBE)/float(RB))*1000     #base current(uA)\n",

       "IC=Bdc*IB/1000                    #Collector current(mA)\n",

       "VCE=VCC-(IC*RC)                   #Collector-emitter voltage(V)\n",

       "\n",

-      "#Result\n",

       "print 'Base current IB =',round(IB,2),'uA'\n",

       "print 'Collector current IC =',round(IC,2),'mA'\n",

       "print 'Collector-emitter voltage VCE = ',round(VCE,2),'V'"

@@ -435,10 +389,7 @@
      "cell_type": "code",

      "collapsed": false,

      "input": [

-      "#Example 6.10.py\n",

-      "#What is the collector-emitter voltage in preceding examples if base supply voltage is 5V?\n",

       "\n",

-      "#Variable declaration\n",

       "VBB=5                    #Base voltage (V)\n",

       "RC=3.6                   #Collector resistance(KOhm)\n",

       "VCC=15                   #collector voltage(V)\n",

@@ -448,7 +399,6 @@
       "VBE2=0.7                 #base-emitter voltage drop2(V)\n",

       "VBE3=1                   #base-emitter voltage drop3(V)\n",

       "\n",

-      "#Calculation\n",

       "IB1=((VBB-VBE1)/float(RB))*1000     #base current1(uA)\n",

       "IC1=Bdc*IB1/1000                    #Collector current1(mA)\n",

       "VCE1=VCC-(IC1*RC)                   #Collector-emitter voltage1(V)\n",

@@ -461,7 +411,6 @@
       "IC3=Bdc*IB3/1000                    #Collector current3(mA)\n",

       "VCE3=VCC-(IC3*RC)                   #Collector-emitter voltage3(V)\n",

       "\n",

-      "#Result\n",

       "print 'Base current IB1 =',round(IB1,2),'uA'\n",

       "print 'Collector current IC1 =',round(IC1,2),'mA'\n",

       "print 'Collector-emitter voltage VCE1 = ',round(VCE1,2),'V'\n",

@@ -507,19 +456,13 @@
      "cell_type": "code",

      "collapsed": false,

      "input": [

-      "#Example 6.11.py\n",

-      "#A 2N3904 has VCE = 10V and Ic = 20mA. find power dissipation. \n",

-      "#How safe is this level of power dissipation if the ambient temperature is 25 deg C?\n",

       "\n",

-      "#Variable declaration\n",

       "VCE=10                    #Collector-emitter voltage(V)\n",

       "IC=20                     #Collector current(mA)\n",

       "T=25                      #Ambient temperature(deg C)\n",

       "                    \n",

-      "#Calculation\n",

       "PD = VCE*IC               #Power dissipation(mW)\n",

       "\n",

-      "#Result\n",

       "print 'Power dissipation PD = ',PD,'mW'\n",

       "print 'for 25 deg C, power rating is 625 mW So, transistor is well within power rating.'"

      ],

@@ -549,21 +492,16 @@
      "cell_type": "code",

      "collapsed": false,

      "input": [

-      "#Example 6.12.py\n",

-      "#How safe is the level of power dissipation if the ambient temeprature is 100 deg C in example 6-11?\n",

       "\n",

-      "#Variable declaration\n",

       "T1=100                    #Ambient temperature(deg C)\n",

       "T2=25                     #Reference temperature(deg C)\n",

       "mf=5                      #Multiply factor(mW/deg C)   \n",

       "Pr=625                    #power rating(mW)\n",

       "\n",

-      "#Calculation\n",

       "Td=T1-T2                  #Temperature difference(deg C)\n",

       "Pd=mf*Td                  #Difference in power(mW)\n",

       "PDmax=Pr-Pd               #Maximum power dissipation(mW)\n",

       "\n",

-      "#Result\n",

       "print 'Maximum Power dissipation PDmax = ',PDmax,'mW'\n",

       "print 'for 25 deg C, power rating is 625 mW So, transistor is yet within power rating.'"

      ],