The following question has four choices out of which ONLY ONE is correct.

If the forward voltage in a diode increases, the width of the depletion region

The current gain (β) of a transistor in common emitter mode is 40. To change the collector current by 160 mA at constant V_CE, the necessary change in the base current is

In a common base circuit of a transistor, the current amplification factor is 0.95. What is the base current when emitter current is 2 mA?

In a common emitter configuration of a transistor, the voltage drops across a 500 Ω resistor in the collector circuit of 0.5 V. If the current gain in the common base mode is 0.96, then the base current is

In the given circuit, the current through the resistor of 2 kΩ is

A p-n junction diode is connected to a battery of emf 5.5 V and external resistance of 5.1 kΩ. The barrier potential in the diode is 0.4 V. The current in the circuit is

The minimum potential difference between the base and emitter required to switch a silicon transistor 'ON' is approximately

In the circuit given below, an A.C. voltage V = 220 volt (r.m.s.) is applied. The maximum voltage across the capacitor will be

A p-type semiconductor has acceptor levels 57 meV above the valence band. The wavelength of light required to create a hole is

Two triodes A and B have the amplification factor of 40. The plate and load resistances are 4kΩ and 8kΩ, respectively. If an amplifier circuit is made using only one of them with a load resistance of 8 kΩ, then what will be the ratio of voltage gains obtained from them?