Semiconductor Diode — Prelims Questions

A p-n junction diode is connected to a battery as shown in the circuit diagram. The potential barrier across the p-n junction is $0.7\,\text{V}$. What is the current flowing through the $100,\Omega$ resistor if the diode is considered ideal?

Which of the following statements about the depletion region in a p-n junction is INCORRECT?

A germanium diode has a cut-in voltage of $0.3\,\text{V}$. If it is connected in series with a $200,\Omega$ resistor and a $1.5\,\text{V}$ battery (positive terminal to anode), what is the current flowing through the circuit?

The I-V characteristic curve of a p-n junction diode is shown. What does the region 'X' represent?

Which of the following factors does NOT significantly affect the reverse saturation current ($I_S$) of a p-n junction diode?

A silicon diode is connected in series with a $500,\Omega$ resistor and a $10\,\text{V}$ DC supply. If the diode has a forward voltage drop of $0.7\,\text{V}$ when conducting, what is the power dissipated by the resistor?