- 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) NOT gate D) NOR gate
- 2. How many truth table entries are required for a 3-input NAND gate?
A) 9 B) 27 C) 6 D) 3
- 3. How many flip flops are contained in a 7474 IC?
A) 1 B) 4 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) 220kΩ B) 22kΩ C) 22MΩ D) 2200Ω
- 6. A resistor with colour code " Yellow Red Red Gold" has a value of:
A) 240kΩ B) 430Ω C) 4.2kΩ D) 420Ω
- 7. The 3 pins of a bipolar transistor are called the:
A) Source, Drain and Gate B) Plate, Electrode and Collector C) Collector, Emitter and Base D) Collection, Bass, Gate
- 8. The total resistance of the following resistor combination is:
A) 1360Ω B) 920Ω C) 340Ω D) 680Ω
- 9. The total resistance of the following resistor combination is:
A) 900Ω B) 450Ω C) 225Ω D) 9000Ω
- 10. The voltage Vout of the voltage divider circuit is:
A) 6 volts B) 4.5 volts C) 3 volts D) 9 volts
- 11. The total current flowing through this circuit is:
A) 100mA B) 1mA C) 1 A D) 0.01 A
- 12. The total capacitance of the following capacitor combination is:
A) 1000µF B) 50µF C) 200µF D) 100µF
- 13. The total capacitance of the following capacitor combination is:
A) 100µF B) 50µF C) 200µF D) 1000µF
- 14. The total capacitance of the following capacitor combination is:
A) 100µF B) 250µF C) 50µF D) 150µF
- 15. An Infra-Red transmitter usually transmits at a frequency of:
A) 5kHz B) 38kHz C) 40kHz D) 28kHz
- 16. The following charging capacitor circuit has a Time Constant of:
A) 5 seconds B) 3 seconds C) 2 seconds D) 10 seconds
- 17. The capacitor in the circuit is fully charged after:
A) 50 seconds B) 20 seconds C) 10 seconds D) 40 seconds
- 18. A 555 IC can be operated in:
A) Monostable Mode B) Bistable Mode C) All three modes D) Astable 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) 5 volts B) 12 volts C) 78 volts D) 17 volts
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