- 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) 3 B) 9 C) 27 D) 6
- 3. How many flip flops are contained in a 7474 IC?
A) 4 B) 1 C) 3 D) 2
- 4. The basic logic gate whose output is the inverse or complement of its input is called a(n):
A) NOT gate B) AND gate C) NAND gate D) XOR gate
- 5. A resistor with colour code "Red Red Orange Gold" has a value of:
A) 22MΩ B) 22kΩ C) 2200Ω D) 220kΩ
- 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) Collector, Emitter and Base C) Plate, Electrode and Collector D) Collection, Bass, Gate
 - 8. The total resistance of the following resistor combination is:
A) 1360Ω B) 340Ω C) 920Ω D) 680Ω
 - 9. The total resistance of the following resistor combination is:
A) 225Ω B) 450Ω C) 9000Ω D) 900Ω
 - 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) 0.01 A B) 100mA C) 1mA D) 1 A
 - 12. The total capacitance of the following capacitor combination is:
A) 50µF B) 200µF C) 100µF D) 1000µF
 - 13. The total capacitance of the following capacitor combination is:
A) 100µF B) 200µF C) 50µF D) 1000µF
 - 14. The total capacitance of the following capacitor combination is:
A) 250µF B) 100µF C) 50µF D) 150µF
- 15. An Infra-Red transmitter usually transmits at a frequency of:
A) 5kHz B) 38kHz C) 28kHz D) 40kHz
 - 16. The following charging capacitor circuit has a Time Constant of:
A) 3 seconds B) 5 seconds C) 10 seconds D) 2 seconds
 - 17. The capacitor in the circuit is fully charged after:
A) 50 seconds B) 10 seconds C) 20 seconds D) 40 seconds
- 18. A 555 IC can be operated in:
A) Astable Mode B) All three modes C) Bistable Mode D) Monostable Mode
- 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) 17 volts B) 78 volts C) 12 volts D) 5 volts
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