Electronics

Written by Dr. Hamza Farooq (Physics)

Class 12 · Physics · 8 questions

Name: ____________________ Date: ____________

In an n type semiconductor the majority carriers are:
- A Neutrons
- B Holes
- C Electrons
- D Protons
A p n junction diode conducts when it is:
- A Heated only
- B Reverse biased
- C Forward biased
- D Never
A transistor can act as an:
- A Only a resistor
- B Amplifier or a switch
- C Only a battery
- D Only a capacitor
An operational amplifier has an ideal input resistance of:
- A Zero
- B 1 ohm
- C 100 ohm
- D Infinity
A NAND gate output is 0 only when:
- A Both inputs are 1
- B Both inputs are 0
- C Inputs differ
- D Any input is 1
In a transistor, the base is:
- A Thick and heavily doped
- B An insulator
- C Thin and lightly doped
- D A metal
A Zener diode is used as a:
- A Inductor
- B Voltage regulator
- C Capacitor
- D Rectifier only
A full wave rectifier uses:
- A Capacitors only
- B Two or four diodes
- C Inductors only
- D One transistor

Answer key

1. C, 2. C, 3. B, 4. D, 5. A, 6. C, 7. B, 8. B