- 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) OR gate C) NOR gate D) NOT gate
- 2. How many truth table entries are required for a 3-input NAND gate?
A) 9 B) 6 C) 27 D) 3
- 3. How many flip flops are contained in a 7474 IC?
A) 3 B) 2 C) 4 D) 1
- 4. The basic logic gate whose output is the inverse or complement of its input is called a(n):
A) NAND gate B) AND gate C) NOT gate D) XOR gate
- 5. A resistor with colour code "Red Red Orange Gold" has a value of:
A) 2200Ω B) 22MΩ C) 220kΩ D) 22kΩ
- 6. A resistor with colour code " Yellow Red Red Gold" has a value of:
A) 4.2kΩ B) 240kΩ C) 430Ω D) 420Ω
- 7. The 3 pins of a bipolar transistor are called the:
A) Collector, Emitter and Base B) Plate, Electrode and Collector C) Source, Drain and Gate D) Collection, Bass, Gate
- 8. The total resistance of the following resistor combination is:
A) 920Ω B) 1360Ω C) 680Ω D) 340Ω
- 9. The total resistance of the following resistor combination is:
A) 900Ω B) 225Ω C) 9000Ω D) 450Ω
- 10. The voltage Vout of the voltage divider circuit is:
A) 3 volts B) 4.5 volts C) 6 volts D) 9 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) 100µF B) 1000µF C) 200µF D) 50µF
- 13. The total capacitance of the following capacitor combination is:
A) 50µF B) 1000µF C) 100µF D) 200µF
- 14. The total capacitance of the following capacitor combination is:
A) 100µF B) 250µF C) 50µF D) 150µF
- 15. An Infra-Red transmitter usually transmits at a frequency of:
A) 5kHz B) 28kHz C) 40kHz D) 38kHz
- 16. The following charging capacitor circuit has a Time Constant of:
A) 10 seconds B) 5 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) Astable Mode B) Bistable Mode C) Monostable Mode D) All three modes
- 19. If you decrease the AREA of the plates of a capacitor, you:
A) Decrease the capacitance B) Short circuit the capacitor C) Increase the energy storage of the capacitor D) Increase the capacitance
- 20. A 7805 Voltage regulator can provide a constant output voltage of:
A) 78 volts B) 12 volts C) 5 volts D) 17 volts
|