The plate current in a diode is zero. It is possible that
(a) the plate voltage is zero
(b) the plate voltage is slightly negative
(c) the plate voltage is slightly positive
(d) the temperature of the filament is low

Open in App

Solution

(a) the plate voltage is zero
(b) the plate voltage is slightly negative
(c) the plate voltage is slightly positive
(d) the temperature of the filament is low

The plate current varies directly with the plate voltage. Therefore, if the plate voltage is zero, the plate current is also zero. Due to the same reason, if the plate voltage is negative, the plate current will be zero. Now, if the plate is slightly positive, then it may be the reason that the plate voltage is not able to reduce the effect of space charge. Hence, the current may be zero. Now, as the temperature of the filament is low, it will not be able to emit electrons and the resulting plate current will be zero. Hence, all the options are possible.

Suggest Corrections

Similar questions

In an experiment, the saturation in the plate current in a diode is observed at 240V. But a student still wants to increase the plate current. It can be done, if

Q. A triode is operated in the linear region of its characteristics. If the plate voltage is slightly increased, the dynamic plate resistance will
(a) increase
(b) decrease
(c) remain almost the same
(d) become zero

Q. The plate current in a diode is 20 mA when the plate voltage is 50 V or 60 V. What will be the current if the plate voltage is 70 V?

Q. In space charge limited region, the plate current in a diode is

10 m A

for plate voltage

150 V

. If the plate voltage is increased to

600 V

, then the plate current will be:-

Q. In a diode valve the plate currents are

I_{1}

and

I_{2}

at plate voltage 400

V

and 200

V

respectively, at constant filament current. The ratio

I_{1} / I_{2}

is :

Join BYJU'S Learning Program

The plate current in a diode is zero. It is possible that (a) the plate voltage is zero (b) the plate voltage is slightly negative (c) the plate voltage is slightly positive (d) the temperature of the filament is low

The plate current in a diode is zero. It is possible that
(a) the plate voltage is zero
(b) the plate voltage is slightly negative
(c) the plate voltage is slightly positive
(d) the temperature of the filament is low