- 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) NOR gate
C) NOT gate
D) OR gate
- 2. How many truth table entries are required for a 3-input NAND gate?
A) 9
B) 3
C) 27
D) 6
- 3. How many flip flops are contained in a 7474 IC?
A) 2
B) 1
C) 4
D) 3
- 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) AND gate
D) XOR 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) 420Ω
D) 4.2kΩ
- 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) 680Ω
B) 340Ω
C) 920Ω
D) 1360Ω
- 9. The total resistance of the following resistor combination is:
A) 9000Ω
B) 900Ω
C) 450Ω
D) 225Ω
- 10. The voltage Vout of the voltage divider circuit is:
A) 9 volts
B) 6 volts
C) 4.5 volts
D) 3 volts
- 11. The total current flowing through this circuit is:
A) 100mA
B) 1mA
C) 0.01 A
D) 1 A
- 12. The total capacitance of the following capacitor combination is:
A) 50µF
B) 1000µF
C) 100µF
D) 200µF
- 13. The total capacitance of the following capacitor combination is:
A) 200µF
B) 1000µF
C) 100µF
D) 50µF
- 14. The total capacitance of the following capacitor combination is:
A) 150µF
B) 50µF
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) 10 seconds
B) 5 seconds
C) 2 seconds
D) 3 seconds
- 17. The capacitor in the circuit is fully charged after:
A) 10 seconds
B) 40 seconds
C) 20 seconds
D) 50 seconds
- 18. A 555 IC can be operated in:
A) Astable Mode
B) Monostable Mode
C) All three modes
D) Bistable Mode
- 19. If you decrease the AREA of the plates of a capacitor, you:
A) Short circuit the capacitor
B) Increase the capacitance
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) 5 volts
B) 12 volts
C) 78 volts
D) 17 volts
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