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In order to reduce the reverse recovery time of the diodes, __________ is carried out.
b Explanation: Platinum & gold doping improves the performance of the devices.
b
Explanation: Platinum & gold doping improves the performance of the devices.
See lessShown below is the diagram of an ideal super diode. When the input voltage Vin is negative, then the output voltage Vout = ?
c Explanation: When the input voltage is negative, there would be a negative voltage on the diode so it works like an open circuit. Hence no current flows through the load and Vout is zero.
c
Explanation: When the input voltage is negative, there would be a negative voltage on the diode so it works like an open circuit. Hence no current flows through the load and Vout is zero.
See lessIn the equilibrium state the barrier, potential across a unbiased germanium diode is __________
a Explanation: Barrier potential is due to the charges that establish an electric field across the two junctions.
a
Explanation: Barrier potential is due to the charges that establish an electric field across the two junctions.
See lessIn the equilibrium state, the barrier potential across a unbiased silicon diode is _________
b Explanation: Barrier potential is due to the charges that establish an electric field across the two junctions.
b
Explanation: Barrier potential is due to the charges that establish an electric field across the two junctions.
See lessIn case of a practical p-n junction diode, the rise in the junction temperature ___________
a Explanation: The rise in temperature excites the charges, which go & recombine with the charges in the depletion region decreasing its width. Higher the temperature, lesser is the E.M.F required to turn on the device.
a
Explanation: The rise in temperature excites the charges, which go & recombine with the charges in the depletion region decreasing its width. Higher the temperature, lesser is the E.M.F required to turn on the device.
See lessWhen the p-n junction diode is reversed biased, the width of the depletion region __________
a Explanation: When reverse biased depletion layer increases until the breakdown value is reached.
a
Explanation: When reverse biased depletion layer increases until the breakdown value is reached.
See lessWhen the p-n junction diode is forward biased, the width of the depletion region__________
b Explanation: When forward biased depletion layer decreases & finally it collapses to allow the current flow.
b
Explanation: When forward biased depletion layer decreases & finally it collapses to allow the current flow.
See lessIn an AC-DC converter, a diode might be used as a
c Explanation: In converters diodes are used to feed the energy back to the load in case of an inductive load.
c
Explanation: In converters diodes are used to feed the energy back to the load in case of an inductive load.
See lessFor a p-n junction diode, the peak inverse current & the reverse recovery time are dependent on
c Explanation: It only depends upon the number stored charges which depends upon the rate of change of current.
c
Explanation: It only depends upon the number stored charges which depends upon the rate of change of current.
See lessEven after the forward current reduces to zero value, a practical diode continues to conduct in the reverse direction for a while due to the
c Explanation: Due to the stored charges during the earlier current flow, even when the current reduces to zero due to some structural properties of the device, the device takes time to sweep out the stored charges.
c
Explanation: Due to the stored charges during the earlier current flow, even when the current reduces to zero due to some structural properties of the device, the device takes time to sweep out the stored charges.
See less