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When a television set (scientifically known as a television receiver) is opened, many components…
When a television set (scientifically known as a television receiver) is opened, many components like semiconductor diodes, transistors, capacitors, resistors etc. can be observed on its motherboard. There are different types of diodes like photo diode, Zener diode, LED etc. found in the T.V. set. With the help of these components, a television receives audio as well as video signals.
(i)
A semiconductor diode has two types of semiconducting materials: ‘P’ type and ‘N’ type. What is the difference between them?
(ii)
Draw a labelled diagram of a full wave rectifier. Show graphically how its output voltage varies with time.
Draw: circuit diagram of a full wave rectifier with centre-tapped transformer, two diodes, and load resistor, along with input and output voltage waveforms
Must show: centre-tapped transformer, two p-n junction diodes D1 and D2, load resistor R_L, input AC waveform, output rectified DC waveform
(iii)
What type of diode can be used as a voltage regulator?
Answer
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From ISC 2025 Physics Paper 1, question 20.