- 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) 3 B) 27 C) 9 D) 6
- 3. How many flip flops are contained in a 7474 IC?
A) 3 B) 1 C) 2 D) 4
- 4. The basic logic gate whose output is the inverse or complement of its input is called a(n):
A) XOR gate B) NAND gate C) AND gate D) NOT 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) Collection, Bass, Gate B) Plate, Electrode and Collector C) Source, Drain and Gate D) Collector, Emitter and Base
 - 8. The total resistance of the following resistor combination is:
A) 1360Ω B) 920Ω C) 680Ω D) 340Ω
 - 9. The total resistance of the following resistor combination is:
A) 900Ω B) 9000Ω C) 450Ω D) 225Ω
 - 10. The voltage Vout of the voltage divider circuit is:
A) 9 volts B) 3 volts C) 4.5 volts D) 6 volts
 - 11. The total current flowing through this circuit is:
A) 1 A B) 0.01 A C) 1mA D) 100mA
 - 12. The total capacitance of the following capacitor combination is:
A) 100µF B) 1000µF C) 200µF D) 50µF
 - 13. The total capacitance of the following capacitor combination is:
A) 1000µF B) 200µF C) 50µF D) 100µF
 - 14. The total capacitance of the following capacitor combination is:
A) 50µF B) 250µF C) 150µF D) 100µF
- 15. An Infra-Red transmitter usually transmits at a frequency of:
A) 28kHz B) 5kHz C) 38kHz D) 40kHz
 - 16. The following charging capacitor circuit has a Time Constant of:
A) 3 seconds B) 2 seconds C) 10 seconds D) 5 seconds
 - 17. The capacitor in the circuit is fully charged after:
A) 20 seconds B) 40 seconds C) 10 seconds D) 50 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) Short circuit the capacitor C) Increase the energy storage of the capacitor D) Decrease the capacitance
- 20. A 7805 Voltage regulator can provide a constant output voltage of:
A) 12 volts B) 5 volts C) 78 volts D) 17 volts
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