Physics : Semiconductor Electronics: Materials, Devices and Simple Circuits

In the figure shown, if the diode forward voltage drop is 0.2 V, the voltage difference between A and B is

• 2.2 V

• 1.3 V

• 0

• 0.5 V

Which of the following semi-conducting device is used as voltage regulator ?

• LASER diode

• Zener diode

• Solar cell

• Photo diode

Which of the following logic gate is universal gate ?

If l₁, l₂, l₃ are the lengths of the emitter,base and collector of a transistor, then

• l₃ < l₂ < l₁

• l₁ = l₂ = l₃

• l₃ < l₁ < l₂

• l₂ < l₁ < l₃

When the conductivity of a semiconductor is only due to breaking of covalent bonds, the semiconductor is called

• intrinsic

• extrinsic

• p-type

• n-type

To get output for the following circuit, the correct choice for the input is,

• A=1, B=0, C = 0

• A=1, B=1, C = 0

• A=1, B=0, C=1

• A=1, B=0, C=1

Consider the junction diode as ideal. The value of current flowing through AB is,

• 10^-2 A

• 10^-1 A

• 10^-3 A

• 10^-3 A

A p-n-p transistor is connected in a common emitter configuration in a given amplifier. A load resistance of 800 ohm is connected in the collector circuit and the voltage drop across it is 0.8 V. If the current amplification factor is 0.96 and the input resistance of the circuit is 192 ohm, the voltage gain and the power gain of the amplifier will respectively be,

• 3.69,3.84

• 4,4

• 4,3.69

• 4,3.69

If in a p-n junction, a square input signal of 10 V is applied as shown,


then the output across R_L will be

Which logic gate is represented by this following combination of logic gates?

• OR

• NAND

• AND

• AND