You dont have javascript enabled! Please enable it! MCQ in Electrical Circuit Part 4 | ECE Board Exam

# MCQ in Electrical Circuit Part 4 | ECE Board Exam

This is the Multiples Choice Questions Part 4 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.

#### MCQ Topic Outline included in ECE Board Exam Syllabi

• MCQ in AC-DC circuits
• MCQ in Resistors
• MCQ in Inductors
• MCQ in Capacitors

#### Continue Practice Exam Test Questions Part 4 of the Series

Choose the letter of the best answer in each questions.

151. Metal tin becomes superconductor at approximately

A. 6K

B. 3.7K

C. 5K

D. 4.7K

Solution:

152. In a complex resistance-reactance plane, XL is represented

A. By an axis opposite the R axis

B. By an axis perpendicular to the XC axis

C. By an axis opposite the XC axis

D. By an axis parallel to the R axis

Solution:

153. When the net reactance in a series coil-capacitor circuit is zero at frequency f, the nature of its reactance of frequency 2f is

A. Inductive

B. Capacitive

C. Resistive

D. Infinite

Solution:

154. Which of the following is a way of decreasing mutual inductance?

A. Moving the coils closer

B. Moving the coils apart

C. Decreasing the number of turns of either coil

D. Increasing the number of turns of either coil

Solution:

155. The charging of a capacitor through a resistance obeys

A. Exponential law

B. Logarithmic law

C. Linear law

D. Square law

Solution:

156. The Q-factor of a parallel resonant circuit is also known as

A. Voltage magnification factor

B. Current magnification factor

C. Gain magnification factor

D. Resonance magnification factor

Solution:

157. What is the specific resistance of a pure silicon?

A. 55 ฮฉ-mm

B. 55 ฮฉ-m

C. 55 ฮฉ-cm

D. 55 kฮฉ-m

Solution:

158. A capacitance of 0.05 ฮผF equals

A. 0.05 x 10^6 F

B. 0.05 x 10^-6 F

C. 0.05 x 10^-12 F

D. 0.05 x 10^12 F

Solution:

159. A 5 ฮผF capacitor charge to 5V has a stored charge equal to

A. 1 ฮผc

B. 5 ฮผc

C. 25 ฮผC

D. 200 ฮผc

Solution:

160. The factor 0.707 for converting peak to rms applies only to

A. Square waves

B. Triangle waves

C. Sawtooth waves

D. Sine waves

Solution:

161. When two in-phase sine waves that have identical frequency and amplitude are added together, then the result is a sine wave with __________ the amplitude of either.

A. Half

B. Twice

C. Four times

D. One-fourth

Solution:

162. Liquids that are good conductors because of ionization are called

A. Electrolytic

B. Bases

C. Acid

D. Electrolytes

Solution:

163. Tungsten filament of bulbs has a hot resistance higher than its cold resistance due to its temperature coefficient which is

A. Positive

B. Negative

C. Zero

D. Infinite

Solution:

164. A term used to express the amount of electrical energy stored in electrostatic field.

A. Joules

B. Coulombs

C. Watts

D. Electron-volt

Solution:

165. With double the number of turns by the same length and area, the inductance is

A. The same

B. Doubled

C. Quartered

Solution:

166. The temperature coefficient of resistance of electrolytes is

A. Negative

B. Positive

C. Zero

D. Infinite

Solution:

167. What refers to the lowest voltage across any insulator that can cause current flow?

A. Conduction voltage

B. Critical voltage

C. Breakdown voltage

D. Voltage capacity

Solution:

168. Capacitance increase with

A. Larger plate area and less distance between plates

B. Larger plate area and greater distance between plates

C. Smaller plate area and less distance between plates

D. Higher values of applied voltage

Solution:

169. What is the resonant frequency of a circuit when L of 3 microhenrys and C of 40 picofarads are in series?

A. 14.5 kHz

B. 145 MHz

C. 14.5 MHz

D. 145 kHz

Solution:

170. For a triangular and sawtooth waveform the rms voltage or current equals

A. 0.707 times peak value

B. 0.577 times peak value

C. 0.577 times average value

D. 0.707 times rms value

Solution:

171. If two resistances of 9 ฮฉ and 6 ฮฉ are connected in parallel, the total resistance is

A. 54 ฮฉ

B. 0.3 ฮฉ

C. 15 ฮฉ

D. 3.6 ฮฉ

Solution:

172. Refers specifically to steady state values of quantities in ac circuits which are complex numbers.

A. Domain

B. Scalar quantity

C. Vector quantity

D. Phasor quantity

Solution:

173. A capacitor is used to

A. Block dc current

B. Pass dc current

C. Open voltage source

D. Short the voltage source

Solution:

174. The usual load of a dc circuit is a/an

A. Resistor

B. Capacitor

C. Inductor

D. Both inductor and capacitor

Solution:

175. The second strip of an electronic resistor color-code represents

A. The multiplier

B. The second digit of the value

C. The temperature

D. The tolerance

Solution:

176. Which of the following is a preferred resistor value?

A. 520

B. 47

C. 43,000

D. 54,321

Solution:

177. A three-by-three, series-parallel matrix of resistors, all having the same ohmic value, would have a net resistance of

A. One-third the value of a single resistor

B. Three times the value of a single resistor

C. The same value as a single resistor

D. Nine times the value of a single resistor

Solution:

178. In an ac wave, 30 degrees of phase is _________ of a cycle.

A. ยฝ

B. 1/12

C. 1/3

D. 1/30

Solution:

179. What is the value of a carbon composition resistor with the following color code: Brown, white, orange, red

A. 190 ฮฉ; 10%

B. 19 kฮฉ; 2%

C. 19 kฮฉ; 20%

D. 1.9 kฮฉ; 2%

Solution:

180. The electric field strength between capacitor plates has a unit of

A. Volts per meter

B. Volts per mil

C. Amperes per meter

D. Amperes per mil

Solution:

181. For multi-plate capacitor, capacitance is proportional to

A. Number of plates less one (n โ 1)

B. Number of plates plus one (n + 1)

C. Number of plates less two (n – 2)

D. Number of plates (n)

Solution:

182. A capacitor consists of two

A. Conductors only

B. Dielectric only

C. Conductors separated by a dielectric

D. Dielectric separated by a conductor

Solution:

183. How many coulombs are delivered by a storage battery in 25 hours if it is supplying current at the rate of 3 A?

A. 2.592 x 10^5 C

B. 2.592 x 10^3 C

C. 2.592 x 10^8 C

D. 2.592 x 10^12 C

Solution:

184. When frequency of an ac wave decreases, the value of XL in a coil

A. Approaches zero

B. Gets larger positively

C. Gets larger negatively

D. Stays constant

Solution:

185. The temperature-resistance coefficient of pure gold is

A. 0.0034

B. 0.0037

C. 0.0038

D. 0.0039

Solution:

186. The capacitor opposes any change in voltage across it by

A. Passing a voltage proportional to the rate of change of current

B. Acting as a short circuit at time equal to zero

C. Passing a current proportional to the rate of change of voltage

D. Acting as a short circuit at time equal to infinity

Solution:

187. What is the most common non-sinusoidal waveform?

A. Square wave

B. Triangular wave

C. Trapezoidal wave

D. Sawtooth wave

Solution:

188. Which of the following capacitors is suitable for dc filter circuits?

A. Mica

B. Ceramic

C. Paper

D. Electrolytic

Solution:

189. A series RL circuit has R of 10 ฮฉ and XL of 5 ฮฉ, its impedance in rectangular form is given by

A. 10 + j5 ฮฉ

B. 10 + j10 ฮฉ

C. 10 โ j5 ฮฉ

D. 10 โ j10 ฮฉ

Solution:

190. What is the reciprocal of capacitance?

A. Reluctance

B. Susceptance

C. Elastance

D. Conductance

Solution:

191. If the output resistance of a voltage source is 4 ฮฉ, it internal resistance should be

A. 4 ฮฉ

B. 8 ฮฉ

C. 2 ฮฉ

D. Infinite

Solution:

192. The curve between current and frequency is termed as

A. Voltage curve

B. Gain curve

C. Power curve

D. Resonance curve

Solution:

193. What is the total effective capacitance of two 0.25 ฮผF capacitors connected in series?

A. 0.125 ฮผF

B. 1.25 ฮผF

C. 0.50 ฮผF

D. 2.5 if

Solution:

194. What can be used to estimate resonant frequency and to find reactance at any frequency for any value of capacitor or inductor?

A. Smith chart

B. Reactance chart

C. Impedance chart

D. Resonance chart

Solution:

195. For a parallel AC circuit, ___________ is used as a reference phasor.

A. Voltage

B. Power

C. Current

D. Resistance

Solution:

196. For a series AC circuit, _________ is not used as a reference phasor.

A. Voltage

B. Impedance

C. Current

D. Conductance

Solution:

197. If a certain circuit has a current that is lagging the voltage by 45ห, then it displays

A. Pure inductive reactance

B. Resistance and capacitance reactance

C. Resistance and inductive reactance

D. Pure capacitive reactance

Solution:

198. What maximum voltage can be applied across the capacitor for very short period of time?

A. Working voltage

B. Surge voltage

C. Stray voltage

D. Peak voltage

Solution:

199. What is expected when two 20 kฮฉ, 1 watt resistor in parallel are use instead of one 10 kฮฉ, 1 watt?

A. Provides higher current

B. Provides less power

C. Provides more power

D. Provides wider tolerance

Solution:

200. Which of the following materials has the lowest dielectric strength?

A. Glass

B. Paper

C. Mica

D. Teflon

Solution:

#### Questions and Answers in Electrical Circuit

Following is the list of practice exam test questions in this brand new series:

MCQ in Electrical Circuit
PART 1: MCQ from Number 1 โ 50                        Answer key: PART 1
PART 2: MCQ from Number 51 โ 100                   Answer key: PART 2
PART 3: MCQ from Number 101 โ 150                 Answer key: PART 3
PART 4: MCQ from Number 151 โ 200                 Answer key: PART 4
PART 5: MCQ from Number 201 โ 250                 Answer key: PART 5
PART 6: MCQ from Number 251 โ 300                 Answer key: PART 6
PART 7: MCQ from Number 301 โ 350                 Answer key: included
PART 8: MCQ from Number 351 โ 400                 Answer key: included
PART 9: MCQ from Number 401 โ 450                 Answer key: included
PART 10: MCQ from Number 451 โ 500                 Answer key: included

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

P inoyBIX educates thousands of reviewers and students a day in preparation for their board examinations. Also provides professionals with materials for their lectures and practice exams. Help me go forward with the same spirit.

โWill you subscribe today via YOUTUBE?โ

Subscribe

• Full Content Access Exclusive to Premium members

## PINOYBIX FREEBIES FOR PREMIUM MEMBERSHIP:

• CIVIL ENGINEERING REVIEWER
• CIVIL SERVICE EXAM REVIEWER
• CRIMINOLOGY REVIEWER
• ELECTRONICS ENGINEERING REVIEWER (ECE/ECT)
• ELECTRICAL ENGINEERING & RME REVIEWER
• FIRE OFFICER EXAMINATION REVIEWER
• LET REVIEWER
• MASTER PLUMBER REVIEWER
• MECHANICAL ENGINEERING REVIEWER
• NAPOLCOM REVIEWER

## FOR A LIMITED TIME

If you subscribe for PREMIUM today!

Join the PinoyBIX community.

DaysHoursMinSec
This offer has expired!