MCQs

The Zener diode is A Linear device A Non-Linear device An Amplifying device None of these Correct answer: 2. A Non-Linear device

A crystal diode has forward resistance of order of KΩ MΩ None of these Ω Correct answer: 4. Ω

The most extensively used rectifier is Bridge Full-Wave Rectifier Centre-Tap Full-Wave Rectifier Half-Wave Rectifier None of these Correct answer: 1. Bridge Full-Wave Rectifier

A Zener diode is destroyed if it Carries more than rated current Is forward biased Is reverse biased None of these Correct answer: 1. Carries more than rated current

As compared to crystal diode, the doping level in a Zener diode is Less More Same None of these Correct answer: 2. More

Maximum efficiency of a half-wave rectifier is 0.2 0.4 0.406 0.85 Correct answer: 3. 0.406

If temperature of crystal diode increases then leakage current Becomes zero Decreases Increases Remains the same Correct answer: 3. Increases

The leakage current in a crystal diode is due to which of following Junction Capacitance Majority Carriers Minority Carriers None of these Correct answer: 3. Minority Carriers

Ammeter is used to measure power in a three-phase load FALSE TRUE Correct answer: 1. FALSE

If arrow of crystal diode symbol is positive with respect to bar, then diode is Either forward or reverse Forward biased Reverse biased None of these Correct answer: 2. Forward biased