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