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In the equilibrium state the barrier, potential across a unbiased germanium diode is __________
b Explanation: Barrier potential is due to the charges that establish an electric field across the two junctions.
b
See lessExplanation: Barrier potential is due to the charges that establish an electric field across the two junctions.
In 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
See lessExplanation: 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
When 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
See lessExplanation: When forward biased depletion layer decreases & finally it collapses to
allow the current flow.
In 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
See lessExplanation: In converters diodes are used to feed the energy back to the load in case of
an inductive load.
For 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
See lessExplanation: It only depends upon the number stored charges which depends upon the
rate of change of current.
Even 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
See lessExplanation: 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