# MCQ in Engineering Electromagnetics Part 4 | ECE Board Exam

(Last Updated On: June 16, 2022) This is the Multiples Choice Questions Part 4 of the Series in Engineering Electromagnetics as one of the General Engineering and Applied Sciences (GEAS) 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 past Board Questions in General Engineering and Applied Sciences (GEAS) field.

### PRC Board of Electronics Engineering Examination Syllabi (ECE Board)

The licensure exam shall cover different areas in the field of Electronics Engineering as prescribed by the Board. Under the Implementing Rules and Regulation of R.A. 9292, the licensure exam shall compose of four subjects each with 100 items covering different areas and with its own bearing to the overall rating. The applicant shall have a general weighted average of more than 70% and a grade above 70% for each subject areas to pass the licensure exam.

Mathematics – 20%

1. College Algebra

• Equations in One Variable
• Functions
• Determinants
• Matrices
• Sequences and Series

2. Trigonometry

• Trigonometric functions
• Applications

3. Geometry

• Analytic Geometry
• Plane Geometry
• Solid Mensuration

4. Differential Calculus

• Derivatives and its Applications
• Functions, Continuity and Limits
• Higher-Order Derivatives
• Parametric Equations and Partial Differentiation

5. Integral Calculus

• Integration and its Applications
• Surface and Multiple Integrals and its Applications

6. Differential Equations

• First-Order, First-Degree ODE and its Applications
• Higher-Order ODE and its Applications

• Complex Number and its Applications
• Power Series, Fourier Series and its Applications
• Laplace Transforms, Inverses, and its Applications
• Fourier Transforms, Inverses and its Applications
• Z-Transforms
• Partial Differential Equations

8. Probability and Statistics

• Fundamental Principles of Counting
• Permutations and Combinations
• Measures of Central Tendency and Variations
• Probability Distributions
• Presentation of Data and Sampling Techniques
• Inferential Statistics
• Analysis of Variance, Regressions and Correlations

9. Discrete Mathematics

• Set Theory and Mathematical Logic
• Binary Operations
• Growth of Functions
• Algorithms

10. Numerical Methods

• Analysis of Errors
• Evaluation of Series Expansion of Functions
• Analysis of Variance, Regressions and Correlations
• Simultaneous Linear and Nonlinear
• ODE
• PDE

General Engineering and Applied Sciences – 20%

1. Engineering Mechanics

2. Strength of Materials

3. College Physics

4. General Chemistry

5. Thermodynamics

6. Engineering Materials

7. Engineering Economics

8. Engineering Management

9. Electromagnetics

10. Laws and Ethics

• Contract and specifications
• Telecommunications and broadcasting laws and regulations
• Electronics Engineering Law of 2004
• Code of professional ethics and conduct
• Philippine electronic code

Electronics Engineering – 30%

1. Electricity/Magnetism Fundamentals

• Atomic Structure
• Electric Charge
• Laws (ohms, Kirchhoff, coulomb, etc.)
• Magnetic Power
• Magnetic field/flux
• Magnetic/electric quantities/units
• Magnetic/electromagnet principles

2. Electrical Circuit

• Ac-dc circuits
• Resistors
• Inductors
• Capacitor

3. Solid State Devices/Circuits

• Semi-conductor fundamentals
• Transistor components, circuits, analysis, and design
• Special services (photo, electric, photo voltaic etc.)

4. Power Generator, Sources, Principles and Applications

• Cells and batteries
• Electric Generator
• Electronic power supply
• Voltage regulation
• Distribution transformer
• MUPS/Float-battery system
• Converters/inverters

5. Electronic (Audio/RF) Circuit, Analysis and Design

• Amplifiers
• Oscillators
• Rectifier
• Filters
• Voltage regulation

6. Tests and Measurements

• Volt-ohm-ammeter (analog/digital)
• R-L-Z bridges
• Oscilloscope
• RF meters
• Signal generators (audio, RF, video)
• Noise generators
• Power/reflectometer/grid dip meter

7. Microelectronics

• Integrated circuits components, characteristics, and products
• Operational amplifiers/multivibrators

8. Industrial Electronics Principles and Applications

• Electronic control system
• Industrial solid-state services
• Welding system/high frequency heating
• Feedback systems/servomechanism
• Transducers
• Motor speed control systems
• Robotic principles
• Bioelectrical principles
• Instrumentation and control

9. Computer Principles

• Analog/digital system
• Binary number system, Boolean algebra
• Mathematical logic and switching networks
• Basic digital circuits (logic, gates, flip-flops, multivibrators etc.)
• Static and dynamic memory devices
• Programming and machine languages
• Information and acquisition processing
• Analog/Digital conversion
• Computer Networking

Electronics Systems and Technologies – 30%

1. Transmission Fundamentals

• Transmission system
• Transmission medium
• Primary line constants
• Velocity and line wavelength
• Characteristic Impedance
• Propagation constants
• Phase and group velocity
• Standing waves
• Voltage Standing Wave Ratio
• Telephone lines and cables
• Wave guides
• Balanced and unbalanced lines
• Twisted pair wire
• Coaxial Cable
• The decibel
• Power dB calculations
• Signal and Noise fundamentals

2. Acoustics

• Definition
• Frequency range
• Sound pressure level
• Sound Intensity
• Loudness level
• Pitch and frequency
• Internal and octave
• Sound distortion
• Room acoustics
• Electro-Acoustics transducers

3. Modulation

• Amplitude modulation
• Phase modulation
• Frequency modulation
• Pulse modulation

4. Noise

• External noise
• Phase noise
• Noise calculation and measurements

• Wave propagation
• Wavelength calculations
• Diversity systems

6. Antennas

• Basic considerations
• Current and voltage distribution
• Resonant, non-resonant antennas
• Terms and definition
• Antenna gain and resistance
• Bandwidth, beamwidth, polarization
• Effects of ground on antennas
• Grounded, ungrounded antennas
• Grounding systems
• Antenna height
• Design and applications
• Matching systems
• Impedance calculations
• Antenna types
• Directional and non-directional
• Microwave antennas
• Wideband and Special purpose antennas

7. Wire and wireless communications System

• The telephone set
• Connection and performance
• Exchange area plant
• Loop design
• Trunks in the exchange plant
• Insertion loss
• Traffic calculations
• Reference Equivalent and standards
• Telephone networks
• Signaling, Billing, CAMA, ANI
• Echo, signing and design loss
• Via net loss
• Network hierarchy, class type
• VF repeaters
• Transmission considerations in long distance network
• Telephone features – IDD, NDD, LEC
• Mobile communications

8. Microwave Communications and Principles

9. Basic principles of various Electronics System

• Electro-optics/photonics/optoelectronics
• Electromagnetic
• Avionics, aerospace, navigational and military applications
• Medical electronics
• Cybernetics
• Biometrics

B. Digital and Data Communications Systems

1. Digital Communication Networks

• Bit and Binary transmission
• Signaling rate
• Error probability
• Digital filtering
• Switching
• Packet circuit
• Vertical circuit
• Open systems interconnection
• Multiplying, modulation, and synchronization
• Pulse code modulation
• Companding
• Encoding
• Bandwidth and signal to noise ratio
• Delta modulation
• Codes and protocol
• Error detection and correction codes
• Digital carrier systems
• Frequency shift keying
• Phase shift keying
• Differential phase shift keying
• DC nature of data transmission
• Loops
• Neutral and polar
• Binary transmission and the concept of time
• Asynchronous and synchronous
• Timing
• Distortion
• Bits, band, WPM
• Data interface standards
• Data input/output devices
• Digital transmission on analog channel
• Modulation – demodulation schemes parameters
• Circuit conditioning
• Modem applications
• Serial and parallel transmission

2. Fiber Optics

• Principles of light, transmission
• Types
• Light sources, laser, LED
• Light detectors
• Modulation and waveform
• System design
• General application
• Design procedure
• Dispersion limited domain
• System bandwidth
• Splicing techniques

3. Satellite, Broadcasting and Cable TV System

a. Satellite system

• The satellite system
• Types of satellite
• Satellite orbit
• Demand assignments multiple access
• Antenna tracking
• Path loss
• Figure of merit
• Ratio of carrier to thermal noise power
• Station margin
• VSAT

b. Broadcasting and Cable TV System

• Radio transmitter (AM, FM, Television)
• Studio (Microphone, Amplifiers, Cameras, Lighting etc.)
• Cable television

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

Choose the letter of the best answer in each questions.

151. Cavity is a rectangular wave guide _______.

A. Open at both ends

B. Shorted at both ends

C. With one end open and the other shorted

D. None of these

Solution:

152. Antenna tuning is done by changing its___________.

A. Inductive reactances

B. Capacitive reactances

C. Both (a) and (b)

D. None of these

Solution:

153. Resonant frequency of an antenna depends upon its___________.

A. Physical length

B. Electrical length

C. None of these

D. Cannot say

Solution:

154. Impedance of an antenna is matched to feed___________.

A. Line

C. Both (a) and (b)

D. None of these

Solution:

155. In low-power applications, ideal SWR is___________.

A. 1:1

B. 1:2

C. 2:1

D. 2:2

Solution:

156. Which of the following is a low-gain antenna?

A. Dish antenna on a space craft

B. Wi-Fi antenna

C. Both (a) and (b)

D. None of these

Solution:

157. In the case of an ideal isotropic antenna, the geometric radiation pattern is___________.

A. Circle

B. Sphere

C. Parabola

D. Hyperbola

Solution:

158. Antenna gain is minimum at radiation pattern___________.

A. Side lobes

B. Back lobes

C. None of these

D. Gain is independent of the radiation pattern

Solution:

159. Elliptical polarization can be of___________.

A. Left hand

B. Right hand

C. Either (a) or (b)

D. None of these

Solution:

160. Transmitters used on vehicles are__________ polarized.

A. Linearly

B. Circularly

C. Both (a) and (b)

D. None of these

Solution:

161. Antenna bandwidth can be increased by using__________.

A. A feed horn

B. Thicker wires

C. Cages

D. All of these

Solution:

162. Antenna array is__________.

A. 1-D

B. 2-D

C. Either (a) or (b)

D. None of these

Solution:

163. Array factor depends upon__________.

A. Number of elements

B. Spacing among elements

C. Phase of the applied signal

D. All of these

Solution:

164. If antenna directivity and antenna gain are equal, then antenna efficiency is __________%.

A. 20

B. 50

C. 75

D. 100

Solution:

165. If antenna array elemental spacing is large, then directivity will be__________.

A. Small

B. More

C. None of these

D. Cannot say

Solution:

166. On the basis of the radiation pattern, an antenna array is__________.

B. End fire

C. Either (a) or (b)

D. None of these

Solution:

167. In __________array, radiation is perpendicular to array orientation.

B. End fire

C. None of these

D. Cannot say

Solution:

168. In __________array, radiation is in the same direction as the array orientation.

B. End fire

C. None of these

D. Cannot say

Solution:

169. A large aperture means antenna gain will be__________.

A. Large

B. Small

C. None of these

D. Cannot say

Solution:

170. A short dipole antenna is__________.

A. Left end-fed

B. Right end-fed

C. Centre-fed

D. None of these

Solution:

171. The force between two charges is 120 N. if the distance between the charge is doubled, the force will be

A. 60 N

B. 30 N

C. 40 N

D. 15 N

Solution:

172. The electric field intensity at a point situated at 4 meters away from a point charge 200 N/C. if the distance is reduced to 2 meters, the field intensity will be.

A. 400 N/C

B. 600 N/C

C. 800 N/C

D. 1200 N/C

Solution:

173. A hole of radius b (b < a) is now drilled along the length of the wire at a distance d from the center of the wire as shown below. The magnetic field inside the hole is

A. uniform and depends only on d

B. uniform and depends only on b

C. uniform and depends on both b and d

D. non uniform

Solution:

174. The line of force due to charged particles are always

A. Always straight

B. Always curve

C. Always circle

D. None of the above

Solution:

175. The electric field at a point situated as a distance d from straight charged conductor is

A. Proportional to d

B. Inversely proportional to d

C. Inversely proportional to distance

D. None of the above

Solution:

176. The direction of electric field due to +0 positive charge is

A. Away from the charge

B. Towards the charge

C. Both (a) & (b)

D. None of the above

Solution:

177. A field line and equipotential surface are

A. Always parallel

B. Always at 90 angle

C. Inclined at any angle

D. None of the above

Solution:

178. The ability of charged bodies to exert force on any another is attributed to the existence of

A. Electrons

B. Protons

C. Neutrons

D. Electric field

Solution:

179. A capacitor stored 0.24 coulombs at 10 volts, its capacitance is

A. 0.024F

B. 0.12 F

C. 0.6 F

D. 0.8 F

Solution:

180. For making a capacitor, it is better to select a dielectric having

A. Low permittivity

B. High permittivity

C. Permittivity same as that of air

D. Permittivity slightly more than that of air

Solution:

181. The units of capacitance are

A. Volts/coulomb

B. Coulombs/volt

C. Ohms

D. Henry/wb

Solution:

182. If three 15 µf capacitors are connected in series, the net capacitance is

A. 5 µf

B. 30 µf

C. 40 µf

D. 50 µf

Solution:

183. A dielectric material must be

A. Resistor

B. Insulator

C. Good conductor

D. Semi-conductor

Solution:

184. An electrolytic capacitor can be used for

A. D.C. only

B. AC .only

C. Both

D. C. as well as A.C.

Solution:

185. The capacitance of a capacitor is not affected by

A. Distance between plates

B. Area of plates

C. Thickness of plates

D. All of the above

Solution:

186. Which of the following is not a vector?

A. Linear momentum

B. Angular momentum

C. Electric field

D. Electric potential

Solution:

187. Two plates of parallel plate capacitor after being charged from a constant voltage source are separated apart by means of insulated handles, then the

A. Voltage across the plates increases

B. Voltage across the plates decreases

C. Charge on the capacitor decreases

D. Charge on the capacitor increases

Solution:

188. If A.C. voltage is applied to capacitive circuit, the alternating current can flow in the circuit because

A. Varying voltage produces the charging and discharging currents

B. Of high peak value

C. Discharge current can flow

D. Charging current can flow

Solution:

189. Voltage applied across a ceramic dielectric produces an electrolytic field 100 times greater than air. What will be the value of dielectric constant?

A. 50

B. 100

C. 150

D. 200

Solution:

190. Which of the following statements is correct?

A. Air capacitors have a black band to indicate the outside foil

B. Electrolytic capacitor must be connected in the correct polarity

C. Ceramic capacitors must be connected in the correct polarity

D. Mica capacitors are available in capacitance value of 1 to 10 pf

Solution:

191. The dissipation factor of good dielectric is of the order of

A. 0.0002

B. 0.002

C. 0.02

D. 0.2

Solution:

192. “the total electric flux through any closed surface surrounding charges is equal to the amount of charge enclosed “.

A. Coulomb’s square law

B. Gauss’s law

C. Maxwell’s first law

D. Maxwell’s second law

Solution:

193. Which of the following statement is true?

A. The current in the discharging capacitor grows linearly

B. The current in the discharging capacitor grows exponentially

C. The current in the discharging capacitor decays exponentially

D. The current in the discharging capacitor decreases constantly

Solution:

194. Which of the following expression is correct for electric field strength?

A. E = D/E

B. E = D2/t

C. E = jtD

D. E = nD2

Solution:

195. In a capacitor the electric charge is stored in

A. Glass

B. Vacuum

C. Ceramics

D. Oils

Solution:

196. Which of the following capacitors will have the least variation?

A. Paper capacitor

B. Ceramic capacitor

C. Silver plated mica capacitor

D. None of the above

Solution:

197. Which of the following capacitor has relatively shorter shelf life?

A. Mica capacitor

B. Electrolytic capacitor

C. Ceramic capacitor

D. Paper capacitor

Solution:

198. The sparking between two electrical contacts can be reduced by inserting a

A. Capacitor in parallel with contacts

B. Capacitor in series with each contact

C. Resistance in line

D. None of the above

Solution:

199. In the case of lossy capacitor, its series equivalent resistance value will be

A. Small

B. Very small

C. Large

D. Zero

Solution:

200. The power dissipated in a pure capacitor is

A. Zero

B. Proportional to applied voltage

C. Proportional to value of capacitance

D. Both (b) and (c) above

Solution:

### Complete List of MCQs in General Engineering and Applied Science per topic

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