- 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) OR gate C) NOR gate D) AND gate
- 2. How many truth table entries are required for a 3-input NAND gate?
A) 9 B) 6 C) 3 D) 27
- 3. How many flip flops are contained in a 7474 IC?
A) 2 B) 4 C) 3 D) 1
- 4. The basic logic gate whose output is the inverse or complement of its input is called a(n):
A) XOR gate B) NOT gate C) AND gate D) NAND gate
- 5. A resistor with colour code "Red Red Orange Gold" has a value of:
A) 22MΩ B) 220kΩ C) 2200Ω D) 22kΩ
- 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) Collector, Emitter and Base B) Source, Drain and Gate C) Collection, Bass, Gate D) Plate, Electrode and Collector
- 8. The total resistance of the following resistor combination is:
A) 680Ω B) 920Ω C) 340Ω D) 1360Ω
- 9. The total resistance of the following resistor combination is:
A) 9000Ω B) 900Ω C) 225Ω D) 450Ω
- 10. The voltage Vout of the voltage divider circuit is:
A) 3 volts B) 9 volts C) 6 volts D) 4.5 volts
- 11. The total current flowing through this circuit is:
A) 0.01 A B) 1 A C) 1mA D) 100mA
- 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) 200µF B) 100µF C) 50µF D) 1000µF
- 14. The total capacitance of the following capacitor combination is:
A) 50µF B) 100µF C) 150µF D) 250µF
- 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) 5 seconds B) 10 seconds C) 2 seconds D) 3 seconds
- 17. The capacitor in the circuit is fully charged after:
A) 50 seconds B) 10 seconds C) 20 seconds D) 40 seconds
- 18. A 555 IC can be operated in:
A) Astable Mode B) Bistable Mode C) All three modes D) Monostable Mode
- 19. If you decrease the AREA of the plates of a capacitor, you:
A) Decrease the capacitance B) Increase the energy storage of the capacitor C) Short circuit the capacitor D) Increase the capacitance
- 20. A 7805 Voltage regulator can provide a constant output voltage of:
A) 78 volts B) 5 volts C) 12 volts D) 17 volts
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