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