MCQs

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 PIV rating of a diode is exceeded The diode behaves like a Zener diode The diode conducts poorly The diode is destroyed None of these Correct answer: 3. The diode is destroyed

A crystal diode uses which characteristic for rectification Forward Forward or Reverse Reverse None of these Correct answer: 1. Forward

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

For a ∆-connected generator, there is a 120° difference between each line current and the nearest phase current FALSE TRUE Correct answer: 1. FALSE

When crystal current diode current is large the bias is Forward Inverse Poor Reverse Correct answer: 1. Forward