Task 1: Solve problems using Kirchhoff's laws to calculate currents and voltages in circuits.
A bridge network is shown below, the voltage and currents need to be calculated to aid the inspection process. Determine the voltages and currents for the resistances in the circuit shown below, using Kirchhoff's laws.
Task 2: Solve problems using circuit theorems to calculate currents and voltages in circuits.
A DC circuit is shown below; the currents need to be determined to aid the inspection process. Determine the current in the 20Q resistor of the circuit shown below, using:-
a) Thevenin's Theorem
b) Norton's Theorem
c) Superposition Theorem.
2. Determine the value of the load resistance RI. shown in the circuit below that gives maximum power dissipation and find the value of the power.
Task 3. Solve problems involving current g rowthldecay in an L-R circuit and voltage growthldecay in a C-R circuit.
1. A circuit consists of an uncharged capacitor connected in series with a 50 k0 resistor and has a time constant of 15ms. Determine by calculation a) the capacitance of the capacitor and b) the voltage drop across the resistor 5ms after connecting the circuit to a 20V DC. supply.
2. A field winding of a 200V DC machine has a resistance of 200 and an inductance of 500mH. Calculate:
a) The time constant of the field winding;
b) The value of current flow one time constant after being connected to th e supply, and
c) The current flowing 50ms afte r the supply has been switched on.