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