This is the Multiples Choice Questions Part 6 of the Series in Electrical Circuit as one of the Electronics Engineering topic. In Preparation for the ECE Board Exam make sure to expose yourself and familiarize in each and every questions compiled here taken from various sources including but not limited to past Board Exam Questions in Electronics Engineering field, Electronics Books, Journals and other Electronics References.

### Online Questions and Answers Topic Outline

- MCQs in AC-DC circuits
- MCQs in Resistors
- MCQs in Inductors
- MCQs in Capacitors

### The Series

**Electrical Circuit MCQs**

**MCQs from Number 1 – 50**Answer key:

**PART I**

**MCQs from Number 51 – 100**Answer key:

**PART II**

**MCQs from Number 101 – 150**Answer key:

**PART III**

**MCQs from Number 151 – 200**Answer key:

**PART IV**

**MCQs from Number 201 – 250**Answer key:

**PART V**

**MCQs from Number 251 – 300**Answer key:

**PART VI**

### Continue Practice Exam Test Questions Part 6 of the Series

- A. 70 V
- B. 80 V
- C. 90 V
- D. 100 V

252. What dielectric is generally employed by a variable capacitor?

- A. Mica
- B. Air
- C. Electrolyte
- D. Ceramic

- A. LOCAP switch
- B. AntiLOCAP switch
- C. Anticapacitance switch
- D. Capacitance switch

- A. Bifilar resistor
- B. Wire-wound resistor
- C. Anti-inductive resistor
- D. Bleeder resistor

- A. Mixture
- B. Compound
- C. Alloy
- D. Ionization

- A. Peak
- B. Average
- C. Rms
- D. Instantaneous

- A. Increases two times
- B. Increases four times
- C. Decreases two times
- D. Decreases four times

- A. Decreases
- B. Increases
- C. Decreases or increases
- D. Decreases, increases or remains the same

- A. Halfway between maximum and minimum
- B. Maximum
- C. Minimum
- D. Zero

260. In a circuit, a passive element is one which

- A. Supplies energy
- B. Receives energy
- C. Both supplies and receives energy
- D. Attenuates signal

261. Rationalizing the denominator of a complex number means

- A. Eliminating the j component in the denominator
- B. Adding j component in the denominator
- C. Eliminating the j component in the numerator
- D. Adding j component in the numerator

262. When two complex conjugates are subtracted, the result is a

- A. Quadrature component only
- B. Complex component
- C. In-phase component
- D. Real component

- A. 0
- B. I2XL
- C. IXL
- D. IXL2

- A. 2.5
- B. 5
- C. 10
- D. 25

- A. 10
- B. 5
- C. 50
- D. 100

A. Increased

B. Decreased

C. Constant

D. Zero

- A. Number of plates
- B. Dielectric
- C. Distance between plates
- D. Plate area

- A. Greater electrical power saving
- B. Power loss is minimum
- C. Appliances have different current ratings
- D. All of the above

- A. V(m)2
- B. V(m)
- C. V/m2
- D. V/m

270. Which of the following is the peakiest?

- A. Square wave
- B. Sinusoidal wave
- C. Triangular wave
- D. Rectangular wave

- A. Because it is a simple circuit
- B. Because dc circuits require only resistance as load
- C. Because they do not exist in a dc circuit
- D. Because frequency of dc is zero

- A. Greater than the largest capacitor
- B. Smaller than the largest capacitor
- C. Smaller than the smallest capacitor
- D. Greater than the smallest capacitor

- A. Resistance
- B. Reactance
- C. Inductance
- D. Capacitance

- A. Current
- B. Voltage
- C. Both current and voltage
- D. Neither current nor voltage

- A. 2L and1/2 A
- B. Does not matter because the volume of copper remains the same
- C. L and A
- D. ½ L and 2 A

- A. Quality factor
- B. Power factor
- C. Power ratio
- D. Reactive power

- A. 50 %
- B. 100 %
- C. 25 %
- D. 75 %

- A. Linear law
- B. Hyperbolic law
- C. Inverse-square law
- D. Exponential law

279. Norton’s theorem is what form of an ac equivalent circuit?

- A. Voltage
- B. Current
- C. Both voltage and current
- D. Neither voltage nor current

- A. 200 μF
- B. 2 μF
- C. 100 μF
- D. 0.5 μF

281. An inductive load always has a ___ power factor

- A. Leading
- B. Lagging
- C. Zero
- D. Unity

- A. Less than the smallest resistance in the connection
- B. Greater than the smallest resistance in the connection
- C. Between the smallest and greatest resistance in the connection
- D. Increasing and decreasing depending upon the supply voltage

- A. Large self-induced voltage across L
- B. Long time constant
- C. Low resistance of the open switch
- D. Surge of resistance

- A. Polar diagram
- B. Scalar quantity
- C. Velocity
- D. Phasor

285. Which factor does not affect resistance?

- A. Length
- B. Resistivity
- C. Cross-sectional area
- D. Mass

286. Which of the following capacitors are used only in dc circuits?

- A. Mica
- B. Ceramic
- C. Mylar
- D. Electrolytic

287. The maximum power transfer theorem is used in

- A. Power system
- B. Electronic system
- C. Refrigeration
- D. Air conditioning

288. In Norton’s theorem, the short circuit current is obtained by

- A. Opening the load terminals
- B. Shorting the load terminals
- C. Opening the voltage source
- D. Shorting the voltage source

- A. RL = 2 r
- B. RL = 1.5 r
- C. RL = r
- D. RL = 3 r

- A. 220 V
- B. 150 V
- C. 110 V
- D. 22 V

- A. Smaller than the smallest capacitor
- B. Smaller than the largest capacitor
- C. Greater than any of the capacitor
- D. Greater than the largest capacitor

- A. Superposition theorem
- B. Millman’s theorem
- C. Thevenin’s theorem
- D. Norton’s theorem

- A. Figure of merit
- B. Figure of demerit
- C. Noise factor
- D. Noise figure

- A. CV2/2
- B. 2Q2/C
- C. C2/V
- D. CV

- A. Superposition theorem
- B. Millman’s theorem
- C. Thevenin’s theorem
- D. Norton’s theorem

296. Which of the following capacitors has the highest cost per μF?

- A. Plastic
- B. Air
- C. Mica
- D. Electrolytic

- A. 60 W
- B. 30 W
- C. 15 W
- D. 4 W

- A. Ohm’s law
- B. Coulomb’s law
- C. Kirchhoff’s first law
- D. Kirchhoff’s second law

299. Another term for superconductor.

- A. Generic conductor
- B. Ultraconductor
- C. Cryotron
- D. Cryogenic conductor

300. A circuit whose parameters change with voltage or current.

- A. Non-linear circuit
- B. Linear circuit
- C. Complex circuit
- D. Passive circuit

### Complete List of MCQs in Electronics Engineering per topic

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