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