- 1. The logic gate that will have “1” at its output when any one of its inputs is a 1 is called a(n):
A) OR gate B) NOT gate C) NOR gate D) AND gate
- 2. How many truth table entries are required for a 3-input NAND gate?
A) 3 B) 6 C) 9 D) 27
- 3. How many flip flops are contained in a 7474 IC?
A) 4 B) 2 C) 3 D) 1
- 4. The basic logic gate whose output is the inverse or complement of its input is called a(n):
A) XOR gate B) NAND gate C) AND gate D) NOT gate
- 5. A resistor with colour code "Red Red Orange Gold" has a value of:
A) 22kΩ B) 2200Ω C) 220kΩ D) 22MΩ
- 6. A resistor with colour code " Yellow Red Red Gold" has a value of:
A) 240kΩ B) 420Ω C) 4.2kΩ D) 430Ω
- 7. The 3 pins of a bipolar transistor are called the:
A) Source, Drain and Gate B) Collector, Emitter and Base C) Collection, Bass, Gate D) Plate, Electrode and Collector
 - 8. The total resistance of the following resistor combination is:
A) 920Ω B) 1360Ω C) 680Ω D) 340Ω
 - 9. The total resistance of the following resistor combination is:
A) 225Ω B) 450Ω C) 900Ω D) 9000Ω
 - 10. The voltage Vout of the voltage divider circuit is:
A) 4.5 volts B) 3 volts C) 9 volts D) 6 volts
 - 11. The total current flowing through this circuit is:
A) 1 A B) 1mA C) 100mA D) 0.01 A
 - 12. The total capacitance of the following capacitor combination is:
A) 100µF B) 1000µF C) 50µF D) 200µF
 - 13. The total capacitance of the following capacitor combination is:
A) 1000µF B) 50µF C) 200µF D) 100µF
 - 14. The total capacitance of the following capacitor combination is:
A) 50µF B) 150µF C) 250µF D) 100µF
- 15. An Infra-Red transmitter usually transmits at a frequency of:
A) 5kHz B) 40kHz C) 28kHz D) 38kHz
 - 16. The following charging capacitor circuit has a Time Constant of:
A) 3 seconds B) 5 seconds C) 2 seconds D) 10 seconds
 - 17. The capacitor in the circuit is fully charged after:
A) 20 seconds B) 50 seconds C) 10 seconds D) 40 seconds
- 18. A 555 IC can be operated in:
A) Bistable Mode B) Monostable Mode C) All three modes D) Astable Mode
- 19. If you decrease the AREA of the plates of a capacitor, you:
A) Increase the energy storage of the capacitor B) Increase the capacitance C) Short circuit the capacitor D) Decrease the capacitance
- 20. A 7805 Voltage regulator can provide a constant output voltage of:
A) 5 volts B) 78 volts C) 17 volts D) 12 volts
|