- 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) AND gate C) OR gate D) NOR gate
- 2. How many truth table entries are required for a 3-input NAND gate?
A) 6 B) 3 C) 27 D) 9
- 3. How many flip flops are contained in a 7474 IC?
A) 2 B) 4 C) 1 D) 3
- 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) XOR gate D) AND gate
- 5. A resistor with colour code "Red Red Orange Gold" has a value of:
A) 2200Ω B) 220kΩ C) 22MΩ D) 22kΩ
- 6. A resistor with colour code " Yellow Red Red Gold" has a value of:
A) 430Ω B) 240kΩ 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) 920Ω B) 1360Ω C) 340Ω D) 680Ω
 - 9. The total resistance of the following resistor combination is:
A) 225Ω B) 9000Ω C) 900Ω D) 450Ω
 - 10. The voltage Vout of the voltage divider circuit is:
A) 4.5 volts B) 6 volts C) 9 volts D) 3 volts
 - 11. The total current flowing through this circuit is:
A) 1mA B) 0.01 A C) 100mA D) 1 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) 100µF B) 200µF C) 50µF D) 1000µF
 - 14. The total capacitance of the following capacitor combination is:
A) 50µF B) 150µF C) 250µF D) 100µF
- 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) 10 seconds B) 3 seconds C) 2 seconds D) 5 seconds
 - 17. The capacitor in the circuit is fully charged after:
A) 40 seconds B) 50 seconds C) 10 seconds D) 20 seconds
- 18. A 555 IC can be operated in:
A) Monostable Mode B) Astable Mode C) All three modes D) Bistable 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) Short circuit the capacitor D) Decrease the capacitance
- 20. A 7805 Voltage regulator can provide a constant output voltage of:
A) 17 volts B) 78 volts C) 5 volts D) 12 volts
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