In a junction diode, the holes are due to

When a triode is used as an amplifier the phase difference between the input signal voltage and the output is

Radiowaves of constant amplitude can be generated with

At absolute zero, Si acts as

The current gain for a transistor working as common base amplifier is 0.96. If the emitter current is 7.2 mA, then the base current is

To obtain a p-type germanium semiconductor, it must be doped with

Which of the following, when added as an impurity, into the silicon, produces n-type semiconductor?

When arsenic is added as an impurity to silicon, the resulting material is