Semiconductor Diode Quiz

What happens when a forward biasing voltage is applied to a PN junction diode?

• The depletion layer becomes wider

• The depletion layer becomes thinner

• The diode acts like an open circuit

• The diode conducts infinite current

What is the approximate potential difference across the junction of a silicon diode when it is forward biased?

• 0.3V

• 0.5V

• 1.0V

• 0.7V

What is the result of applying a reverse bias to a PN junction diode?

• The diode conducts infinite current

• The depletion layer becomes thinner

• The depletion layer becomes wider

• The diode acts like an open circuit

What is the approximate potential difference across the junction of a germanium diode when it is forward biased?

• 1.0V

• 0.7V

• 0.5V

• 0.3V

What is the net potential across the resistor in a circuit with an emf of 3.5V and a diode barrier potential of 0.5V connected to a 100Ω resistor?

• 4.5V

• 4.0V

• 3.5V

• 3.0V

What is the characteristic curve of a diode showing zero current flow up to a certain voltage point called?

• Knee point

• Breakdown point

• Saturation point

• Threshold point

What is the action of the depletion layer when a forward biasing voltage is applied to a PN junction diode?

• It becomes wider

• It becomes narrower

• It disappears

• It remains unchanged

What is the result of exceeding the maximum forward current specification of a diode?

• The diode becomes an open circuit

• The diode dissipates more power

• The diode conducts infinite current

• The diode becomes a short circuit

What is the practical application of the avalanche effect in a reverse biased diode?

• Signal modulation

• Voltage stabilization

• Power dissipation

• Current amplification

What is the characteristic of the depletion layer when a diode is reverse biased?

• It remains unchanged

• It becomes wider

• It becomes narrower

• It disappears