- 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) AND gate C) NOR gate D) NOT gate
- 2. How many truth table entries are required for a 3-input NAND gate?
A) 6 B) 27 C) 3 D) 9
- 3. How many flip flops are contained in a 7474 IC?
A) 3 B) 4 C) 1 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) NAND gate C) AND gate D) XOR gate
- 5. A resistor with colour code "Red Red Orange Gold" has a value of:
A) 22MΩ B) 22kΩ C) 220kΩ D) 2200Ω
- 6. A resistor with colour code " Yellow Red Red Gold" has a value of:
A) 4.2kΩ B) 430Ω C) 420Ω D) 240kΩ
- 7. The 3 pins of a bipolar transistor are called the:
A) Collector, Emitter and Base B) Plate, Electrode and Collector C) Source, Drain and Gate D) Collection, Bass, Gate
- 8. The total resistance of the following resistor combination is:
A) 680Ω B) 340Ω C) 920Ω D) 1360Ω
- 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) 9 volts B) 3 volts C) 6 volts D) 4.5 volts
- 11. The total current flowing through this circuit is:
A) 0.01 A B) 100mA C) 1 A D) 1mA
- 12. The total capacitance of the following capacitor combination is:
A) 50µF B) 100µF C) 200µF D) 1000µF
- 13. The total capacitance of the following capacitor combination is:
A) 1000µF B) 50µF C) 100µF D) 200µF
- 14. The total capacitance of the following capacitor combination is:
A) 250µF B) 150µF C) 100µF D) 50µF
- 15. An Infra-Red transmitter usually transmits at a frequency of:
A) 38kHz B) 5kHz C) 28kHz D) 40kHz
- 16. The following charging capacitor circuit has a Time Constant of:
A) 10 seconds B) 3 seconds C) 5 seconds D) 2 seconds
- 17. The capacitor in the circuit is fully charged after:
A) 50 seconds B) 40 seconds C) 20 seconds D) 10 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) Decrease the capacitance B) Short circuit the capacitor C) Increase the capacitance D) Increase the energy storage of the capacitor
- 20. A 7805 Voltage regulator can provide a constant output voltage of:
A) 5 volts B) 17 volts C) 12 volts D) 78 volts
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