- 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) NOT gate B) OR gate C) AND gate D) NOR gate
- 2. How many truth table entries are required for a 3-input NAND gate?
A) 27 B) 6 C) 3 D) 9
- 3. How many flip flops are contained in a 7474 IC?
A) 2 B) 3 C) 4 D) 1
- 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) 22MΩ B) 220kΩ C) 22kΩ D) 2200Ω
- 6. A resistor with colour code " Yellow Red Red Gold" has a value of:
A) 430Ω B) 240kΩ C) 420Ω D) 4.2kΩ
- 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) 900Ω B) 9000Ω C) 225Ω D) 450Ω
- 10. The voltage Vout of the voltage divider circuit is:
A) 3 volts B) 6 volts C) 4.5 volts D) 9 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) 100µF D) 200µF
- 13. The total capacitance of the following capacitor combination is:
A) 200µF B) 1000µF C) 100µF D) 50µF
- 14. The total capacitance of the following capacitor combination is:
A) 50µF B) 100µF C) 150µF D) 250µF
- 15. An Infra-Red transmitter usually transmits at a frequency of:
A) 40kHz B) 28kHz C) 38kHz D) 5kHz
- 16. The following charging capacitor circuit has a Time Constant of:
A) 3 seconds B) 10 seconds C) 5 seconds D) 2 seconds
- 17. The capacitor in the circuit is fully charged after:
A) 20 seconds B) 10 seconds C) 50 seconds D) 40 seconds
- 18. A 555 IC can be operated in:
A) Bistable Mode B) Monostable Mode C) Astable Mode D) All three modes
- 19. If you decrease the AREA of the plates of a capacitor, you:
A) Increase the energy storage of the capacitor B) Increase the capacitance C) Decrease 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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