# MCQ in Electricity and Magnetism Fundamentals Part 7 | ECE Board Exam

(Last Updated On: November 25, 2020) This is the Multiple Choice Questions Part 7 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

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

#### Continue Practice Exam Test Questions Part 7 of the Series

Choose the letter of the best answer in each questions.

301. What composes all matter whether a liquid, solid, or gas?

A. Atoms

B. Electrons

C. Protons

D. Neutrons

Solution:

302. Which of the following is not a basic part of an atom?

A. Electron

B. Proton

C. Neutron

D. Coulomb

Solution:

303. What is the smallest element of a matter?

A. atom

B. molecule

C. crystal

D. wafer

Solution:

304. To determine whether a material can support the flow of electricity or not, we need to examine its

A. atomic structure

B. physical state

C. molecular structure

D. chemical composition

Solution:

305. Approximate diameter of an atom

A. 10^-10 µµm

B. 10^-10 µm

C. 10^-10 mm

D. 10^-10 m

Solution:

306. The lightest kind of atom or element

A. Helium

B. Oxygen

C. Hydrogen

D. Titanium

Solution:

307. Known as the simplest type of atom.

A. Hydrogen

B. Oxygen

C. Helium

D. Nitrogen

Solution:

308. Approximate diameter of a Hydrogen atom

A. 1.1 x 10^-10 µµm

B. 1.1 x 10^-10 µm

C. 1.1 x 10^-10 mm

D. 1.1 x 10^-10 m

Solution:

309. A commonly used model in predicting the atomic structure of a material.

A. String model

B. Wave model

C. Particle model

D. Bohr model

Solution:

310. Is at the center of an atomic structure in a Bohr model.

A. electrons

B. protons

C. neutrons

D. nucleus

Solution:

311. The nucleus of an atom is normally

A. neutral

B. positively charged

C. negatively charged

D. either positively or negatively charged

Solution:

312. What particles that revolve around the positive nucleus?

A. electrons

B. protons

C. neutrons

D. electrons & protons

Solution:

313. In electricity, positive electric charge refers to ____________.

A. protons

B. neutrons

C. electrons

D. atoms

Solution:

314. What is the charge of an electron?

A. 1.6022 x 10^-19 C

B. 9.1096 x 10^-19 C

C. 1.6022 x 10^-31 C

D. 9.1096 x 10^-31 C

Solution:

315. The mass of a proton is approximately

A. 1.6726 x 10^-19 Kg

B. 1.6726 x 10^-27 Kg

C. 1.6022 x 10^-19 Kg

D. 1.6022 x 10^-27 Kg

Solution:

316. Protons are about _________ heavier than electrons.

A. 1,800 times

B. less than thrice

C. less

D. twice

Solution:

317. Approximately, how many electrons that could equal to the mass of a single proton or neutron?

A. 1,863 electrons

B. 1,683 electrons

C. 1,638 electrons

D. 1,836 electrons

Solution:

318. The maximum number of electrons (Ne) that can occupy a given shell (n) is determined by the formula

A. Ne = 2n^2

B. Ne = n^2

C. Ne = 2^n

D. Ne = 2n

Solution:

319. The discrete amount of energy required to move an electron from a lower shell to a higher shell.

A. negative energy

B. positive energy

C. quantum

D. quanta

Solution:

320. Maximum number of orbiting electrons at the first or K shell

A. 2

B. 4

C. 6

D. 8

Solution:

321. Electron is derived from the Greek name elektron which means

A. huge

B. tiny

C. particle

D. amber

Solution:

322. Electric charge of neutron is the same as

A. proton

B. electron

C. current

D. atom

Solution:

323. In an atomic structure, what particle that has no charge and therefore has no effect on its atomic charge

A. electrons

B. protons

C. neutrons

D. nucleons

Solution:

324. The atomic number of an element is determined by the number of

A. electrons

B. valence electrons

C. protons

D. protons or neutrons

Solution:

325. The atomic weight of an element is determined by the number of

A. electrons

B. valence electrons

C. protons

D. protons and neutrons

Solution:

326. If an element has an atomic number of 12, there are how many protons and electrons?

A. 6 protons and 12 electrons

B. 12 protons and 6 electrons

C. 12 protons and 12 electrons

D. 12 protons and 24 electrons

Solution:

327. Suppose there is an atom containing eight protons and eight neutrons in the nucleus, and two neutron are added to the nucleus, the resulting atomic weight is about

A. 8

B. 10

C. 16

D. 18

Solution:

328. It is composed of a series of energy levels containing the valence electrons.

A. conduction band

B. forbidden band

C. side band

D. valence band

Solution:

329. Electrons at the conduction band are called

A. free electrons

B. valence electrons

C. deep state electrons

D. shallow state electrons

Solution:

330. _____________ are electrons at the outer shell

A. Inside shell electrons

B. Conductor electrons

C. Outside shell electrons

D. Valence electrons

Solution:

331. Electrons at the outermost shell are called

A. free electrons

B. valence electrons

C. deep state electrons

D. shallow state electrons

Solution:

332. Which material has more free electrons?

A. Conductor

B. insulators

C. mica

D. dielectric

Solution:

333. Which material has the least number of valence electrons?

A. conductor

B. semiconductor

C. insulator

D. semi-insulator

Solution:

334. What elements possess four valence electrons?

A. Insulators

B. Semi-insulators

C. Semiconductors

D. Conductors

Solution:

335. A good conductor has how many valence electrons?

A. 1

B. 2

C. 4

D. 8

Solution:

336. Materials that might have eight valence electrons

A. conductor

B. insulator

C. semiconductor

D. semi-insulator

Solution:

337. An insulating element or material has capability of _________.

A. conducting large current

B. storing voltage

C. storing high current

D. preventing short circuit between two conducting wires

Solution:

338. A law of nature makes certain materials tend to form combinations that will make them stable. How many electrons in the valence orbit are needed to give stability?

A. 1

B. 2

C. 4

D. 8

Solution:

339. Determine which statement is true?

A. The current carriers in conductors are protons.

B. The current carriers in conductors are valence electrons.

C. Valence and inner electrons are the carriers in conductors.

D. Valence electrons are not the ones that become free electrons.

Solution:

340. A material that contains an abundance of free carrier is called

A. insulator

B. semi-insulator

C. conductor

D. semiconductor

Solution:

341. From the combined energy-gap diagram, which material has the widest gap between valence band and the conduction band?

A. conductor

B. semiconductor

C. super conductor

D. insulator

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Solution:

342. From the combined energy-gap diagram, which material has the smallest energy gap between valence band and the conduction band?

A. conductor

B. semiconductor

C. super conductor

D. insulator

Solution:

343. __________ has a unit of electronvolt(eV).

A. Charge

B. Potential difference

C. Energy

D. Current

Solution:

344. The difference in energy between the valence and conduction bands of a semiconductor is called

A. band gap

B. extrinsict photoeffect

C. conductivity

D. energy density

Solution:

345. The energy gap between the valence band and conduction band of a conductor is in the order of

A. zero electron volt (0 eV)

B. one electron volt (1 eV)

C. five electron volt (5 eV)

D. ten electron volt (10 eV)

Solution:

346. The energy gap of an insulator is in the order of

A. zero electron volt (0 eV)

B. one electron volt (1 eV)

C. five electron volt (5 eV)

D. one-tenth electron volt (0.1 eV)

Solution:

347. In materials, what do you call the region that separates the valence and conduction bands?

A. energy gap

B. forbidden band

C. insulation band

D. energy gap or forbidden band

Solution:

348. What do you call the potential required to remove a valence electron?

A. valence potential

B. threshold potential

C. critical potential

D. ionization potential

Solution:

349. A factor that does not affect the resistance of the material.

A. atomic structure

B. mass

C. length

D. cross-sectional area

Solution:

350. Copper atom has how many protons?

A. 1

B. 4

C. 8

D. 29

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

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

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