This is the Multiple Choice Questions Part 3 of the Series in Engineering Electromagnetics 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.
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.
MCQ Topic Outline: Electromagnetic/Vector Analysis
- MCQ in Algebra of vectors
- MCQ in Vector Product
- MCQ in Vector Calculus
- MCQ in Vector Identities
- MCQ in Derivative of vector functions
- MCQ in Directional derivative, gradient, divergence, curl
- MCQ in Integral Theorems, Green’s Lemma, Divergence Theorem and Strokes’ Theorem
MCQ Topic Outline: Electromagnetics
- MCQ in Steady Electric and Magnetic Fields
- MCQ in Dielectric and Magnetic Materials
- MCQ in Resonance
- MCQ in Coupled and Magnetic Circuits
- MCQ in Time-varying Fields and Maxwell’s Equation
Continue Practice Exam Test Questions Part 3 of the Series
⇐ MCQ in Engineering Electromagnetics Part 2 | ECE Board Exam
Choose the letter of the best answer in each questions.
101. Maxwell’s equations in __________ form give information at points of discontinuity in electromagnetic fields.
A. Differential
B. Integral
C. Algebraic
D. None of these
Answer: Option B
Solution:
102. Another boundary condition using Maxwell’s equations is given as__________.
A. Htan ‘1’ + Htan ‘2’ = 0
B. Htan ‘1’ − Htan ‘2’ = 0
C. Htan ‘1’ + Htan ‘2’ = Js
D. Htan ‘1’− Htan ‘2’ = Js
Answer: Option D
Solution:
103. At the point of discontinuity, __________ component of magnetic flux density is continuous.
A. Tangential
B. Normal
C. None of these
D. Cannot say
Answer: Option B
Solution:
104. For those surfaces where surface charge density is __________ normal component of electric flux density is continuous.
A. Infinity
B. Unity
C. Zero
D. None of these
Answer: Option C
Solution:
105. Waves are used in __________.
A. TV
B. Radio
C. Radar
D. All of these
Answer: Option D
Solution:
106. Displacement current density ____________ current passing through a capacitor.
A. Represents
B. Does not represent
C. Is the same as
D. None of these
Answer: Option B
Solution:
107. Line integral of an electric field around a closed path is __________.
A. infinity
B. unity
C. zero
D. None of these
Answer: Option C
Solution:
108. __________ are caused by accelerated charges
A. Time-varying fields
B. Waves
C. Both (a) and (b)
D. None of these
Answer: Option C
Solution:
109. At the Brewster angle, polarization ______________.
A. Cannot be reflected
B. Is reflected at 30°
C. Is reflected at 90°
D. None of these
Answer: Option A
Solution:
110. Wave number has units of____________.
A. Radians
B. Meter
C. Radians/meter
D. None of these
Answer: Option C
Solution:
111. Wave speed in terms of frequency f and wavelength λ is expressed as _________.
A. f/λ
B. λ/f
C. λ f
D. (λ + f)
Answer: Option C
Solution:
112. For a lossy dielectric medium, ____________.
A. σ = 0
B. σ ≠ 0
C. None of these
D. Cannot say
Answer: Option B
Solution:
113. Wave attenuation is given as ______________.
A. e+βx
B. e-βx
C. e+αx
D. e−αx
Answer: Option D
Solution:
114. In the case of a perfect dielectric medium, phase constant______________ as conductivity increases.
A. Increases
B. Decreases
C. Remains unchanged
D. None of these
Answer: Option A
Solution:
115. Phase velocity is given as _________.
A. ωβ
B. βω
C. β/ω
D. None of these
Answer: Option C
Solution:
116. In good conductors, rate of attenuation is __________.
A. Small
B. Large
C. Infinity
D. Zero
Answer: Option C
Solution:
117. Power density has _________________.
A. A DC component
B. A second harmonic component
C. Both (a) and (b)
D. None of these
Answer: Option C
Solution:
118. Reflection coefficient Γ is __________.
A. ≥100
B. = 10
C. ≤ 1
D. None of these
Answer: Option C
Solution:
119. Which of the following expressions is correct?
A. (1 + Γ) = τ
B. (1 + τ) = Γ
C. (1 + Γ) τ = 0
D. (1 + τ)Γ = 0
Answer: Option A
Solution:
120. Standing wave consists of two travelling waves of ____________ amplitudes and _____________ is direction.
A. Unequal, same
B. Unequal, opposite
C. Equal, same
D. Equal, opposite
Answer: Option D
Solution:
121. SNR ranges from ______.
A. 0 to 1
B. 1 to 10
C. 10 to 100
D. 1 to ∞
Answer: Option D
Solution:
122. The Smith chart is a ________ dimensional representation ofcomplex impedances with respect to coordinates.
A. Two
B. Three
C. Four
D. None of these
Answer: Option C
Solution:
123. In a _________ transmission line, the reflection coefficient domain isa circle of unitary radius.
A. Lossy
B. Lossless
C. None of these
D. Cannot say
Answer: Option B
Solution:
124. The Smith chart represents a family of circles obtained by varying normalized resistance in the range of __________.
A. −1 to 0
B. 0 to 1
C. 0 to ∞
D. −∞ to ∞
Answer: Option C
Solution:
125. A family of arcs is obtained in the Smith chart by varying normalized reactance in a range of __________.
A. −1 to 0
B. 0 to 1
C. 0 to ∞
D. −∞ to ∞
Answer: Option D
Solution:
126. Smith charts depict a wide impedance range of transmitter for _______VSWR.
A. Low
B. High
C. Medium
D. None of these
Answer: Option B
Solution:
127. A cable or a wire is considered as a transmission line if its length is _________of the wavelength of the signal travelling through it.
A. Greater than 1/10
B. Less than 1/10
C. Greater than 1/5
D. Less than 1/5
Answer: Option A
Solution:
128. Transmission lines facilitate _________propagation of energy.
A. Guided
B. Unguided
C. None of these
D. Cannot say
Answer: Option A
Solution:
129. A transmission line is specified in terms of _________.
A. R, G,L
B. G, L,C
C. R, G, L,C
D. None of these
Answer: Option C
Solution:
130. In planar transmission lines, C = _________.
A. σ b/d
B. μ d/b
C. b/d
D. None of these.
Answer: Option C
Solution:
131. In a microstrip line, there is _________metal strip over the substrate.
A. A thin
B. A thick
C. No
D. None of these
Answer: Option A
Solution:
132. In a fully lossless line, σ = _________.
A. 0
B. 1
C. ∞
D. None of these.
Answer: Option C
Solution:
133. In a distortion less line, attenuation constant α is frequency_________.
A. Dependent
B. Independent
C. None of these
D. Cannot say
Answer: Option B
Solution:
134. A distortion less line has _________.
A. Non-vanishing attenuation constant
B. Constant velocity
C. Constant real characteristic impedance
D. All of these
Answer: Option D
Solution:
135. Voltage reflection coefficient is the ratio of _________ wave to_______ wave.
A. Incident, reflected
B. Reflected, incident
C. Incident, absorbed
D. Absorbed, incident
Answer: Option B
Solution:
136. ________ are very efficient in a frequency range of 3-300 GHz.
A. Transmission line
B. Wave guides
C. Both (a) and (b)
D. None of these
Answer: Option B
Solution:
137. Wave guides ________ in DC applications.
A. Can also be used
B. Cannot be used
C. None of these
D. Cannot say
Answer: Option B
Solution:
138. Wave guides are a type of _________ filter.
A. Low pass
B. All pass
C. Band pass
D. High pass
Answer: Option D
Solution:
139. For lossless wave guides, σc ________and σ ______
A. ∞, 0
B. 0, ∞
C. 0, 0
D. ∞, ∞
Answer: Option A
Solution:
140. In the TM mode, Ez _____ and Hz = ________.
A. 0, 0
B. 0, ∞
C. ∞ 0
D. None of these
Answer: Option D
Solution:
141. In the TEM mode, Ez ______ and Hz =_______
A. 0, 0
B. 0, ∞
C. ∞, 0
D. None of these
Answer: Option A
Solution:
142. Below the cut-off frequency, there is_______________.
A. Attenuation
B. No attenuation
C. Amplification
D. None of these.
Answer: Option A
Solution:
143. Cut-off wavelength λc in the TE10 mode is ____________.
A. a
B. 2a
C. 4a
D. 8a
Answer: Option B
Solution:
144. _______ velocity is the one at which loss of constant phase propagates down the guide.
A. Medium
B. Phase
C. Group
D. None of these
Answer: Option B
Solution:
145. Information or energy through the wave guide travels at _______velocity.
A. Medium
B. Phase
C. Group
D. None of these
Answer: Option C
Solution:
146. _______velocity is that whose resultant repeated reflected waves travel down the guide.
A. Medium
B. Phase
C. Group
D. None of these
Answer: Option C
Solution:
147. ________ vector is needed to determine power flow in wave guides.
A. Poynting
B. Average Poynting
C. Power
D. Phase
Answer: Option B
Solution:
148. Surface current density K on wave guide walls for ______ is given as
A. TM mode
B. TE mode
C. Both (a) and (b)
D. None of these
Answer: Option C
Solution:
149. At _______ frequencies, RLC resonant circuits are replaced by electromagnetic cavity resonators.
A. Low
B. Medium
C. High
D. None of these
Answer: Option C
Solution:
150. Resonator cavities are used in _______.
A. Klystron tubes
B. Band-pass filters
C. Wave meters
D. All of these
Answer: Option D
Solution:
Complete List of MCQs in General Engineering and Applied Science per topic
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