Electronics Lecture 2 - PDF

3 Electromotive Force : the maximum possible voltage the battery can provide between its terminals R  3 Kirchhoff’s laws : Kirchhoff’s current law (KCL)...

3 Electromotive Force : the maximum possible voltage the battery can provide between its terminals R  3 Kirchhoff’s laws : Kirchhoff’s current law (KCL) The sum of the currents into a node equals the sum of the currents flowing out of the node >> ∑ I = 0 Kirchhoff’s voltage law (KVL) The sum of the voltages around any closed circuit is zero >> ∑ ∆V = 0 KVL KCL 1) A battery has an emf of 12.0 V and an internal resistance of 0.05 Ω , its terminals are connected to a load resistance of 3.00 Ω.. Find the current in the circuit and the terminal voltage of the battery Calculate the power delivered to the load resistor, internal resistance Calculate the power delivered by the battery 2) Three resistors are connected in parallel as in figure. A potential difference of 18 V is maintained between points a and b … Find the current in each resistor Calculate the power delivered to each resistor and the total power Find the total power delivered to the equivalent resistance 108 198 3) Four resistors are connected as shown in figure … Find the equivalent resistance between points a and c What is the current in each resistor if a 42 V battery is connected between a and c ? Find the currents I1 , I2 and I3 in the circuit shown in figure... 3