Example for negative feedback and positive feedback.

1050

---

What is the importance of valence shell and valence electrons?

1155

---

What are the main purposes for which a common-collector amplifier may be used?

1266

---

Why an electric field is produced in a depletion region of a p-n junction?

1238

---

Define what is back diode?

1157

---

What is a high-pass filter?

1135

---

How is focussing achieved?

1215

---

Why is zener diode used as a voltage regulator?

1050

---

Define what is the effect of temperature on extrinsic semiconductor?

1189

---

Why doping is done in semiconductors?

1195

---

Why the current in power diode varies linearly rather than exponentially with voltage?

1334

---

What is transistor biasing?

1087

---

Explain what are the two mechanisms of breakdown in a p-n junction?

1266

---

Define why series inductor and l-section filters cannot be used with half-wave rectifiers?

1143

---

What is back diode?

1104

---