WorksheetsSemiconductor and Diode Quiz
Total questions: 20
Worksheet time: 10mins
P-type semiconductors are formed by adding:
Trivalent impurities
Pentavalent impurities
Monovalent impurities
Divalent impurities
Which of the following is a pentavalent dopant?
Gallium
Boron
Indium
Phosphorus
The SCR conducts when:
Anode is negative
No voltage is applied
Gate is triggered
Cathode is positive
Reverse biasing a P-N junction results in:
High current
Breakdown
Very small current
Oscillation
Forward biasing reduces the:
Depletion region
Current
Voltage
Resistance
In reverse bias, the depletion layer:
Decreases
Remains same
Increases
Disappears
The diode current equation is:
I = Io(e^V/ηVT - 1)
I = V/R
I = P/V
I = VR
Which factor affects the diode biasing condition?
Power supply
Temperature
Capacitance
Inductance
Zener diode is heavily doped to:
Increase current
Increase reverse breakdown voltage
Decrease breakdown voltage
Increase resistance
Zener diode conducts in reverse bias when:
Voltage < 0.3V
Voltage > breakdown voltage
Voltage = 0
Current = 0
In active mode, the base-emitter junction is:
Reverse biased
Forward biased
Open
Closed
In an N-channel JFET, the majority carriers are:
Holes
Electrons
Ions
Photons
The region where the JFET acts as a constant current source is called:
Ohmic region
Cut-off region
Saturation region
Breakdown region
Pinch-off voltage in a JFET is the voltage at which:
Current becomes zero
Gate opens
Current saturates
Device breaks down
The main advantage of a MOSFET over a BJT is:
Current gain
Voltage gain
High input impedance
Low noise
The controlling terminal of a MOSFET is the:
Source
Drain
Gate
Body
In an enhancement-type MOSFET, channel forms when:
No voltage is applied
Gate is grounded
Sufficient positive gate voltage is applied
Drain is grounded
IGBT is mainly used in:
Low-power circuits
Audio amplifiers
High-power applications
Radio tuning
SCR is a type of:
Diode
Transistor
Thyristor
Resistor
The SCR conducts when:
Anode is negative
No voltage is applied
Gate is triggered
Cathode is positive
