Example for negative feedback and positive feedback.

1055

---

What is the importance of valence shell and valence electrons?

1159

---

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

1272

---

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

1249

---

Define what is back diode?

1162

---

What is a high-pass filter?

1139

---

How is focussing achieved?

1218

---

Why is zener diode used as a voltage regulator?

1056

---

Define what is the effect of temperature on extrinsic semiconductor?

1194

---

Why doping is done in semiconductors?

1203

---

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

1335

---

What is transistor biasing?

1093

---

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

1269

---

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

1145

---

What is back diode?

1110

---