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