Multiple Choice

The plate current in a diode is zero. It is possible that

Athe plate voltage is zero
Correct Answer
Bthe plate voltage is slightly negative
Correct Answer
Cthe plate voltage is slightly positive
Correct Answer
Dthe temperature of the filament is low.
Correct Answer

Solution

We know that plate current directly varies with plate voltage, that is why if the voltage is zero the plate current is also zero.
Due to this very reason if the voltage is slightly negative the plate current is still zero.
Now, let's say the plate current is slightly positive, there may be a possibility that the plate voltage is not able to reduce the effect of space charge. Therefore the plate current is zero.
If the temperature of the filament is low, then it will not be able to emit electrons and hence resulting plate current will definitely be zero

Thus all four options are correct.

SIMILAR QUESTIONS

Semiconductors and Electronic Devices

The conduction band of a solid is partially filled at 0 K. Will it be a conductor, a semiconductor or an insulator ?

Semiconductors and Electronic Devices

The expected energy of the electrons at absolute zero is called

Semiconductors and Electronic Devices

In case of a semiconductor, which of the following statement is wrong

Semiconductors and Electronic Devices

In a semiconductor,

Semiconductors and Electronic Devices

A semiconductor at $$0\ K$$ behaves as :

Semiconductors and Electronic Devices

Among the following, the wrong statement in the case of semiconductor is:

Semiconductors and Electronic Devices

The intrinsic semiconductor behaves as insulator at

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