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