Practice free Semiconductor Electronics: Materials, Devices and Simple Circuits (Physics) NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
In the forward bias arrangement of a PN-junction diode
(b) In forward biasing the P-end is connected to the positive terminal of the battery.
In a PN-junction diode
(a) In forward biased PN-junction, external voltage decreases the potential barrier, so current is maximum. While in reversed biased PN-junction, external voltage increases the potential barrier, so the current is very small
The cut-in voltage for silicon diode is approximately
(b) The cut in voltage for silicon diode = 0.6 V
The electrical circuit used to get smooth output from a rectifier circuit is called
(b) Filter circuits are used to get smooth dc -filter is the best filter.
PN-junction diode works as a insulator, if connected
(c) In reverse bias no current flows.
The electrical resistance of depletion layer is large because
(a) Depletion layer consist of mainly stationary ions.
The PN junction diode is used as
A PN junction diode is commonly used as a rectifier, which converts alternating current (AC) into direct current (DC). When forward-biased, the diode allows current flow in one direction, effectively rectifying the AC signal.
In the depletion region of an unbiased P-N junction diode there are
The depletion region or depletion layer is a region in a P-N junction diode where no mobile charge carriers are present. The depletion layer acts like a barrier that opposes the flow of electrons from the n-side and holes from the p-side.
On increasing the reverse bias to a large value in a PN-junction diode, current
(c) After a large reverse voltage is PN-junction diode, a huge current flows in the reverse direction suddenly. This is called Breakdown of PN-junction diode.
A semiconductor device is connected in a series circuit with a battery and a resistance. A current is found to pass through the circuit. If the polarity of the battery is reversed, the current drops almost to zero. The device may be
(c) When polarity of the battery is reversed, the P-N junction becomes reverse biased so no current flows.
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