- 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) NOR gate C) NOT gate D) AND 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) 2 B) 3 C) 4 D) 1
- 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) 2200Ω B) 220kΩ C) 22kΩ D) 22MΩ
- 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) Collector, Emitter and Base D) Source, Drain and Gate
 - 8. The total resistance of the following resistor combination is:
A) 1360Ω B) 340Ω C) 920Ω D) 680Ω
 - 9. The total resistance of the following resistor combination is:
A) 450Ω B) 900Ω C) 225Ω D) 9000Ω
 - 10. The voltage Vout of the voltage divider circuit is:
A) 6 volts B) 3 volts C) 9 volts D) 4.5 volts
 - 11. The total current flowing through this circuit is:
A) 1 A B) 100mA C) 1mA D) 0.01 A
 - 12. The total capacitance of the following capacitor combination is:
A) 1000µF B) 200µF C) 100µF 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) 50µF B) 150µF C) 250µF D) 100µF
- 15. An Infra-Red transmitter usually transmits at a frequency of:
A) 38kHz B) 40kHz C) 5kHz D) 28kHz
 - 16. The following charging capacitor circuit has a Time Constant of:
A) 5 seconds B) 10 seconds C) 3 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) All three modes B) Astable Mode C) Monostable Mode 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) 12 volts B) 78 volts C) 5 volts D) 17 volts
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