PN Junction Diode MCQs : This section focuses on the "PN Junction Diode" in Semiconductor Devices. These Multiple Choice Questions (MCQs) should be practiced to improve the Semiconductor Devices skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.
A PN Junction Diode is one of the simplest semiconductor devices around, and which has the characteristic of passing current in?
A. no direction
B. one direction
C. two direction
D. multiple direction
Explanation: A PN Junction Diode is one of the simplest semiconductor devices around, and which has the characteristic of passing current in only one direction only.
How many possible biasing conditions there for the standard Junction Diode?
Explanation: There are two operating regions and three possible biasing conditions for the standard Junction Diode and these are: Zero bias, Reverse Bias and Forward Bias.
In which biasing voltage potential is connected negative, (-ve) to the P-type material and positive, (+ve) to the N-type material?
A. Zero Bias
B. Reverse Bias
C. Forward Bias
D. None of the above
Explanation: Reverse Bias : The voltage potential is connected negative, (-ve) to the P-type material and positive, (+ve) to the N-type material across the diode which has the effect of Increasing the PN junction diode’s width.
When a diode is connected in a Zero Bias condition, no external potential energy is applied to the PN junction.
C. Can be true or false
D. Can not say
Explanation: True, When a diode is connected in a Zero Bias condition, no external potential energy is applied to the PN junction.
In PN junction region of a Junction Diode, which of the following are positively charged?
Explanation: The holes are positively charged while the electrons negatively charged.
The junction region itself has no charge carriers and is known as the depletion region.
C. Can be yes or no
D. Can not say
Explanation: Yes, The junction region itself has no charge carriers and is known as the depletion region.
How many junction/s do a diode consist?
Explanation: Diode is a one junction semiconductor device which has one cathode and anode. The junction is of p-n type.
Initially, the p-type carriers are located to the____________of the semiconductor
Explanation: The p-type carriers are nominally located to the left of the junction and n-type carriers are to the right.
During reverse bias, a small current develops known as?
A. Forward current
B. Reverse current
C. Active current
D. Reverse saturation current
Explanation: When the diode is reverse biased, a small current flows between the p-n junction which is of the order of the Pico ampere. This current is known as reverse saturation current.
The displacement of the charges results in
A. Magnetic field
C. Electric field
D. Hall effect
Explanation: The flow of carriers in a semiconductor results in the electric field across the junction. The electric field thus makes the current flow in the device.