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Written Questions: Semiconductors<^< Multiple Choice Quiz: Semiconductors | Course Index | Assignment: Semiconductors >^> The section on the right contains a list of written questions. These can be printed out for your own use. 1. 2. Sketch a typical set of forward and reverse characteristics for a typical silicon diode. Label your graph with typical values. 3. 4. With reference to an NPN bipolar junction transistor, explain each of the following terms: 5. An NPN transistor operates with IE = 2 mA and IB = 1.9 mA. Determine the value of IC and the common emitter current gain, hFE. 6. Sketch circuit symbols for each of the following semiconductor devices: 7. For a small-signal NPN transistor, sketch: 8. A DC power supply produces an output of 7.5 V. The output is to be indicated using an LED rated for operation with a forward voltage of 2.2 V and a current of 20 mA. Sketch a circuit showing how the LED should be connected and specify the value of any additional component required. 9. A zener diode rated at 4.7 V is connected in series with a 220 Ω resistor across the output of a 12 V power supply. Determine the approximate current flowing in the zener diode and the power that will be dissipated in it. <^< Multiple Choice Quiz: Semiconductors | Course index | Assignment: Semiconductors >^> |