- 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) NOR gate C) AND gate D) OR 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) 1 B) 3 C) 2 D) 4
- 4. The basic logic gate whose output is the inverse or complement of its input is called a(n):
A) NAND gate B) NOT gate C) XOR gate D) AND gate
- 5. A resistor with colour code "Red Red Orange Gold" has a value of:
A) 2200Ω B) 22kΩ C) 220kΩ 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) Collector, Emitter and Base B) Collection, Bass, Gate C) Source, Drain and Gate D) Plate, Electrode and Collector
- 8. The total resistance of the following resistor combination is:
A) 1360Ω B) 680Ω C) 920Ω D) 340Ω
- 9. The total resistance of the following resistor combination is:
A) 450Ω B) 9000Ω C) 225Ω D) 900Ω
- 10. The voltage Vout of the voltage divider circuit is:
A) 9 volts B) 4.5 volts C) 3 volts D) 6 volts
- 11. The total current flowing through this circuit is:
A) 1mA B) 1 A C) 100mA D) 0.01 A
- 12. The total capacitance of the following capacitor combination is:
A) 1000µF B) 100µF C) 50µF D) 200µF
- 13. The total capacitance of the following capacitor combination is:
A) 50µF B) 100µF C) 200µF 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) 3 seconds B) 10 seconds C) 5 seconds D) 2 seconds
- 17. The capacitor in the circuit is fully charged after:
A) 40 seconds B) 20 seconds C) 10 seconds D) 50 seconds
- 18. A 555 IC can be operated in:
A) Astable Mode B) All three modes C) Bistable Mode D) Monostable Mode
- 19. If you decrease the AREA of the plates of a capacitor, you:
A) Increase the capacitance B) Decrease the capacitance C) Short circuit the capacitor D) Increase the energy storage of the capacitor
- 20. A 7805 Voltage regulator can provide a constant output voltage of:
A) 12 volts B) 17 volts C) 5 volts D) 78 volts
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