Posted: March 10th, 2016

Describe the procedures of testing a diode and a transistor using an Ohmmeter only. Explain how to determine if the device is faulty or not? Illustrate your answer with drawings.

1. Describe the procedures of testing a diode and a transistor using an Ohmmeter only. Explain how to determine if the device is faulty or not? Illustrate your answer with drawings.

2. Using block diagrams, Illustrate a complete power supply ensuring that you show sketches of all possible voltage waveforms at every stage. Describe the method(s) of testing the circuit of two possible faults in the circuit.

3. For the circuit illustrated in figure 1, the RMS value of the supply voltage is 240V and the frequency is 50Hz.
a. Using software, determine the output waveform of the circuit for the following conditions. For each case, calculate the ripple factor of the circuit.