Q1. Name the three leads of a common transistor
(A) Emitter Collector Bias
(B) Base Collector Case
(C) Collector Bias Emitter
(D) Collector Base Emitter
Answer: Collector Base Emitter
Explanation:
Q2. Input impedance of FET is
(A) Low
(B) High
(C) zero
(D) None of these
Answer: High
Explanation:
Q3. To obtain a higher value of resistance, resistors are connected in:
(A) Series
(B) Parallel
(C) Reverse
(D) Forward
Answer: Series
Explanation:
Q4. A capacitor and coil in parallel is called:
(A) A Timing Circuit
(B) A Delay Circuit
(C) A Schmitt Circuit
(D) A Tuned Circuit
Answer: A Tuned Circuit
Explanation:
Q5. Which of the following amplifier is used in a digital to analog converter?
(A) voltage follower
(B) non inverting
(C) difference amplifier
(D) summing amplifier
Answer: summing amplifier
Explanation:
Q6. Differential amplifiers are used in
(A) voltage followers
(B) buffer
(C) instrumentation amplifiers
(D) All of these
Answer: instrumentation amplifiers
Explanation:
Q7. If a 10k resistor is placed across a 100v supply, the current will be:
(A) 1mA
(B) 10mA
(C) 0.01mA
(D) 0.1mA
Answer: 10mA
Explanation:
Q8. For the XOR gate, what is the output when both inputs are HIGH:
(A) LOW
(B) HIGH
(C) Can be HIGH or LOW
(D) Cannot be determined
Answer: LOW
Explanation:
Q9. The gain of a transistor amplifier falls at high frequencies due to the
(A) Coupling capacitor at the output
(B) Ground Effect
(C) Internal Capacitance of the device
(D) Skin effect
Answer: Internal Capacitance of the device
Explanation:
Q10. Class AB operation is often used in power amplifiers in order to
(A) get maximum efficiency
(B) Remove harmonics
(C) Overcome a crossover distortion
(D) reducing collector dissipation
Answer: Overcome a crossover distortion
Explanation:
Q11. For the XOR gate, what is the output when both inputs are LOW:
(A) HIGH
(B) LOW
(C) Can be HIGH or LOW
(D) Cannot be determined
Answer: LOW
Explanation:
Q12. For the XOR gate, what is the output when only one of the inputs is HIGH:
(A) HIGH
(B) LOW
(C) Can be HIGH or LOW
(D) Cannot be determined
Answer: HIGH
Explanation:
Q13. A DC voltage :
(A) increases
(B) is a sinusoidal wave
(C) remains constant
(D) rises and then falls
Answer: remains constant
Explanation:
Q14. Expand CRO:
(A) Capacitor Resistor Oscillator
(B) Cathode Ray Oscilloscope
(C) Cathode Ray Oscillator
(D) Capacitor Ray Oscillator
Answer: Cathode Ray Oscilloscope
Explanation:
Q15. JFET in its equivalent circuit can be represented as a
(A) Voltage controlled Current source
(B) Voltage controlled Voltage source
(C) Current controlled Voltage source
(D) Current controlled Current source
Answer: Voltage controlled Current source
Explanation:
Q16. The tolerance bands: gold; silver; red, represent:
(A) 5%, 10%, 1%
(B) 5%, 10%, 2%
(C) 10%, 5%, 1%
(D) 10%, 5%, 2%
Answer: 5%, 10%, 2%
Explanation:
Q17. The tolerance bands: gold; silver; brown, represent:
(A) 5%, 10%, 1%
(B) 5%, 10%, 2%
(C) 10%, 5%, 1%
(D) 10%, 5%, 2%
Answer: 5%, 10%, 1%
Explanation:
Q18. 223 on a capacitor represents:
(A) 0.022microfarad
(B) 22,000 picofarad
(C) 22 nanofarad
(D) None of these
Answer: 22 nanofarad
Explanation:
Q19. The current requirement of a LED is:
(A) 1.7mA
(B) 25mA
(C) 50mA
(D) Between 3 and 35mA
Answer: Between 3 and 35mA
Explanation:
Q20. When a step input is given to an op-amp integrator, the output will be
(A) ramp
(B) sinusoidal
(C) rectangular
(D) triangular
Answer: ramp
Explanation:
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