MCQ in Electricity and Magnetism Fundamentals Part 3 | ECE Board Exam

(Last Updated On: April 12, 2018)
Electricity and Magnetism Fundamentals - MCQS Part III

This is the Multiple Choice Questions Part 3 of the Series in Electricity and Magnetism Fundamentals 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

  • MCQs in Atomic Structure
  • MCQs in Electric Charge
  • MCQs in Ohm’s Law, Kirchoff Law, Coulomb’s Law, etc
  • MCQs in Magnetic Power
  • MCQs in Magnetic Field and Magnetic Flux
  • MCQs in Magnetic and Electric Quantities / Units
  • MCQs in Magnetic/Electromagnet Principles

Continue Practice Exam Test Questions Part 3 of the Series

101. How many neutrons does a copper atom have?

  • A. 32
  • B. 33
  • C. 34
  • D. 29
View Answer:

Answer: Option C

Solution:

102. Bonding of atoms that is due to the force of attraction between positive ions and a group of negative ions

  • A. Ionic bond
  • B. Covalent Bond
  • C. Electrostatic Bond
  • D. Metallic bond
View Answer:

Answer: Option D

Solution:

103. An alloy of 22 percent iron and 78 per cent nickel.

  • A. Permalloy
  • B. Alnico
  • C. Constantan
  • D. Manganin
View Answer:

Answer: Option A

Solution:

104. An alloy of 40 percent iron and 60 percent nickel.

  • A. Alnico
  • B. Permalloy
  • C. Hipernik
  • D. Manganin
View Answer:

Answer: Option C

Solution:

105. A commercial alloy of aluminum nickel, and iron with cobalt, copper and titanium added to produce about 12 grades.

  • A. Alnico
  • B. Brass
  • C. Aluminum
  • D. Constantan
View Answer:

Answer: Option A

Solution:

106. The idea of preventing one component from affecting another through their common electric and magnetic field is referred to as

  • A. Hall effect
  • B. Grounding
  • C. Shielding
  • D. Limiting
View Answer:

Answer: Option C

Solution:

107. The physical motion resulting from the forces of magnetic fields is called

  • A. Motor action
  • B. Rotation
  • C. Repulsion
  • D. Torque action
View Answer:

Answer: Option A

Solution:

108. Flux linkages equals

  • A. Flux times area of core
  • B. Flux times number of turns times area of core
  • C. Flux times number of turns times length of core
  • D. Flux times number of turns
View Answer:

Answer: Option D

Solution:

109. Which of the following is a vector quantity?

  • A. Magnetic potential
  • B. Magnetic field intensity
  • C. Magnetic permeability
  • D. Flux density
View Answer:

Answer: Option B

Solution:

110. Which of the following electric quantities is vector in character?

  • A. Field
  • B. Charge
  • C. Energy
  • D. Potential Difference
View Answer:

Answer: Option A

Solution:

111. The quantity 10^6 Maxwell’s is equivalent to one

  • A. Weber
  • B. Gauss
  • C. Gilbert
  • D. Tesla
View Answer:

Answer: Option A

Solution:

112. What is the unit of reluctance?

  • A. Maxwell
  • B. Gauss
  • C. At/Wb
  • D. Weber
View Answer:

Answer: Option C

Solution:

113. What is the SI unit of magnetic flux?

  • A. Tesla
  • B. Weber
  • C. Maxwell
  • D. Gauss
View Answer:

Answer: Option B

Solution:

114. What is the unit of magnetomotive force?

  • A. Volt
  • B. Tesla
  • C. Ampere – turn
  • D. Weber
View Answer:

Answer: Option C

Solution:

115. What is the cgs unit of magnetomotive force?

  • A. Gilbert
  • B. Ampere- turn
  • C. Maxwell
  • D. Weber
View Answer:

Answer: Option A

Solution:

116. The unit of flux is ________ in cgs system.

  • A. Tesla
  • B. Gilbert
  • C. Maxwell
  • D. Oersted
View Answer:

Answer: Option C

Solution:

117. Flux density is measured in

  • A. Tesla
  • B. Weber
  • C. Ampere- turn
  • D. Maxwell
View Answer:

Answer: Option A

Solution:

118. The customary energy unit in atomic and nuclear physics is

  • A. Joule
  • B. Volt- coulomb
  • C. electron-volt
  • D. Walt- second
View Answer:

Answer: Option C

Solution:

119. One ampere- turn is equivalent to ________ gilberts.

  • A. 1.16
  • B. 1.26
  • C. 1.36
  • D. 1.46
View Answer:

Answer: Option B

Solution:

120. The magnetic flux of 2000 lines is how many Maxwells?

  • A. 1000
  • B. 2000
  • C. 4000
  • D. 8000
View Answer:

Answer: Option B

Solution:

121. How much is the flux in Weber in the above problem?

  • A. 2 x 10^-5
  • B. 2 x 10^-3
  • C. 2 x 10^5
  • D. 2 x 10^3
View Answer:

Answer: Option A

Solution:

122. One oersted (Oe) is equivalent to _____ Gb/cm.

  • A. 1
  • B. 10
  • C. 100
  • D. 1000
View Answer:

Answer: Option A

Solution:

123. One electron volt (1 eV) is equivalent to ________ joules

  • A. 1.3 x 10^-19
  • B. 1.4 x 10^-19
  • C. 1.5 x 10^-19
  • D. 1.6 x 10^-19
View Answer:

Answer: Option D

Solution:

124. An electron- volt (eV) is a unit of

  • A. Energy
  • B. Potential difference
  • C. Charge
  • D. Momentum
View Answer:

Answer: Option A

Solution:

125. The unit of electrical energy is

  • A. Joule
  • B. Watt- second
  • C. Kilowatt- hour
  • D. All of these
View Answer:

Answer: Option D

Solution:

126. Electrons at the outer shell are called

  • A. Outer shell electrons
  • B. Inner shell electrons
  • C. Semiconductor electrons
  • D. Valence electrons
View Answer:

Answer: Option D

Solution:

127. Which of the following has the least number of valence electrons?

  • A. Conductor
  • B. Semiconductor
  • C. Insulator
  • D. Semi- insulator
View Answer:

Answer: Option A

Solution:

128. A good conductor has how many valence electrons?

  • A. 1
  • B. 4
  • C. 2
  • D. 8
View Answer:

Answer: Option A

Solution:

129. Which element has four valence electrons?

  • A. Conductor
  • B. Insulator
  • C. Semiconductor
  • D. Semi- insulator
View Answer:

Answer: Option C

Solution:

130. A negative ion results when an atom gains an additional

  • A. Electron
  • B. Proton
  • C. Neutron
  • D. Atom
View Answer:

Answer: Option A

Solution:

131. An atom or a group of atoms that carries a net electric charge.

  • A. Positive ion
  • B. Negative ion
  • C. Ion
  • D. Electron
View Answer:

Answer: Option C

Solution:

132. Hysteresis refers to the ________ between flux density of the material and the magnetizing force applied.

  • A. Leading effect
  • B. Ratio
  • C. Equality
  • D. Lagging effect
View Answer:

Answer: Option D

Solution:

133. Hydrogen is an example of a _______ material.

  • A. Paramagnetic
  • B. Diamagnetic
  • C. Ferromagnetic
  • D. Non- magnetic
View Answer:

Answer: Option B

Solution:

134. Cobalt is an example of a ________ material.

  • A. Paramagnetic
  • B. Diamagnetic
  • C. Ferromagnetic
  • D. Non- magnetic
View Answer:

Answer: Option C

Solution:

135. The evaporation of electrons from a heated surface is called

  • A. Radiation
  • B. Convection
  • C. Thermionic emission
  • D. Conduction
View Answer:

Answer: Option C

Solution:

136. Electron is a Greek word for

  • A. amber
  • B. Fire
  • C. Stone
  • D. Heat
View Answer:

Answer: Option A

Solution:

137. Gases whose particles are charged are known as

  • A. Conductors
  • B. Insulators
  • C. Gaseous Conductors
  • D. Plasma
View Answer:

Answer: Option D

Solution:

138. What principle states that each electron in an atom must have a different set of quantum numbers?

  • A. Inclusion principle
  • B. Exclusion principle
  • C. Quantum principle
  • D. Electron principle
View Answer:

Answer: Option B

Solution:

139. The energy stored in an electrostatic field or electromagnetic field is called

  • A. Electromagnetic energy
  • B. Kinetic energy
  • C. Potential energy
  • D. Rest energy
View Answer:

Answer: Option C

Solution:

140. Which of the following statements is TRUE?

  • A. Silicon dioxide is a good
  • B. The current carriers in conductors are valence electrons
  • C. For conductors, the valence electron are strongly attracted to the nucleus
  • D. The valence electrons are located in the nucleus of an atom
View Answer:

Answer: Option B

Solution:

141. How many electrons are needed in the valence orbit to give a material’s stability?

  • A. 8
  • B. 4
  • C. 6
  • D. 5
View Answer:

Answer: Option A

Solution:

142. Residual magnetism refers to the flux density, which exists in the iron core when the magnetic field intensity is

  • A. Minimized
  • B. Reduced to zero
  • C. Maximize
  • D. Unity
View Answer:

Answer: Option B

Solution:

143. Magnetic intensity is a

  • A. Phasor quantity
  • B. Physical quantity
  • C. Scalar quantity
  • D. Vector quantity
View Answer:

Answer: Option D

Solution:

144. The core of a magnetic equipment uses a magnetic material with

  • A. Least permeability
  • B. Low permeability
  • C. Moderate permeability
  • D. High permeability
View Answer:

Answer: Option D

Solution:

145. Which of the following is a paramagnetic material?

  • A. Carbon
  • B. Copper
  • C. Bismuth
  • D. Oxygen
View Answer:

Answer: Option D

Solution:

146. The permeability of permalloy is

  • A. Very much greater than permeability of air
  • B. Slightly greater than permeability of air
  • C. Slightly less than permeability of air
  • D. Equal to the permeability of air
View Answer:

Answer: Option A

Solution:

147. A t/m is a unit of

  • A. Mmf
  • B. Emf
  • C. Reluctance
  • D. Magnetizing force
View Answer:

Answer: Option D

Solution:

148. The force between two magnetic poles is ________ their poles strength.

  • A. equal to
  • B. directly proportional to
  • C. inversely proportional to
  • D. directly proportional to the square root of
View Answer:

Answer: Option B

Solution:

149. The magnetic energy stored in an inductor is ________ current.

  • A. Directly proportional to
  • B. Inversely proportional to
  • C. Directly proportional to the square of
  • D. Inversely proportional to the square of
View Answer:

Answer: Option C

Solution:

150. One of the common application of an air- cored choke.

  • A. Radio frequency
  • B. Audio frequency
  • C. Power supply
  • D. Power transformer
View Answer:

Answer: Option A

Solution:

Questions and Answers in Electricity and Magnetism Fundamentals

Following is the list of multiple choice questions in this brand new series:
MCQ in Electricity and Magnetism Fundamentals
PART 1: MCQs from Number 1 – 50                        Answer key: PART I
PART 2: MCQs from Number 51 – 100                   Answer key: PART II
PART 3: MCQs from Number 101 – 150                 Answer key: PART III
PART 4: MCQs from Number 151 – 200                 Answer key: PART IV
PART 5: MCQs from Number 201 – 250                 Answer key: PART V
PART 6: MCQs from Number 251 – 300                 Answer key: PART VI
PART 7: MCQs from Number 301 – 350                 Answer key: included
PART 8: MCQs from Number 351 – 400                Answer key: included
PART 9: MCQs from Number 401 – 450                 Answer key: included
PART 10: MCQs from Number 451 – 500                 Answer key: included

Complete List of MCQ in Electronics Engineering per topic

MCQ in Electricity and Magnetism Fundamentals Part 3 | ECE Board Exam
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