- 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) 6 B) 3 C) 9 D) 27
- 3. How many flip flops are contained in a 7474 IC?
A) 3 B) 1 C) 4 D) 2
- 4. The basic logic gate whose output is the inverse or complement of its input is called a(n):
A) NAND gate B) XOR gate C) AND gate D) NOT 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) 240kΩ B) 420Ω C) 4.2kΩ D) 430Ω
- 7. The 3 pins of a bipolar transistor are called the:
A) Plate, Electrode and Collector B) Collector, Emitter and Base C) Collection, Bass, Gate D) Source, Drain and Gate
 - 8. The total resistance of the following resistor combination is:
A) 340Ω B) 680Ω C) 920Ω D) 1360Ω
 - 9. The total resistance of the following resistor combination is:
A) 900Ω B) 9000Ω C) 450Ω D) 225Ω
 - 10. The voltage Vout of the voltage divider circuit is:
A) 6 volts B) 4.5 volts C) 9 volts D) 3 volts
 - 11. The total current flowing through this circuit is:
A) 0.01 A B) 1 A C) 1mA D) 100mA
 - 12. The total capacitance of the following capacitor combination is:
A) 200µF B) 50µF C) 100µF D) 1000µF
 - 13. The total capacitance of the following capacitor combination is:
A) 1000µF B) 50µF C) 100µF D) 200µF
 - 14. The total capacitance of the following capacitor combination is:
A) 100µF B) 50µF C) 250µF D) 150µF
- 15. An Infra-Red transmitter usually transmits at a frequency of:
A) 38kHz B) 28kHz C) 5kHz D) 40kHz
 - 16. The following charging capacitor circuit has a Time Constant of:
A) 5 seconds B) 3 seconds C) 10 seconds D) 2 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) All three modes C) Astable Mode 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) 5 volts B) 12 volts C) 78 volts D) 17 volts
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