Test Bank for An Introduction to Electrical

Test Bank for An Introduction to Electrical Science, 1e Adrian Waygood (All Chapters, Chapter 1 Missing)

Chapter 2

• Neils Bohr's model of the atom consists of a nucleus of

(A) electrons, orbited by neutrons and protons.(B) electrons and neutrons, orbited by protons.(C) protons and neutrons, orbited by electrons.(D) protons and electrons, orbited by neutrons.(E) 0

Answer: (E) 0

• Matter composed entirely of the same type of atom is called

(A) an element.(B) a compound.(C) a conductor.(D) an insulator.

Answer: (A) an element.

• Matter composed of different types of atom is called

(A) an element.(B) a compound.(C) a conductor.(D) an insulator.

Answer: (B) a compound.

• Hydrogen is an example of

(A) an element.(B) a compound.(C) a conductor.(D) an insulator.

Answer: (A) an element.

• Carbon monoxide is an example of

(A) an element.(B) a compound. Stuvia.com - The Marketplace to Buy and Sell your Study Material

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Stuvia.com - The Marketplace to Buy and Sell your Study Material(C) a conductor.(D) an insulator.

Answer: (B) a compound.

• An atom's positively-charged sub-particles are called

(A) neutrons.(B) protons.(C) electrons.(D) quanta.

Answer: (B) protons.

• An atom's negatively-charged sub-particles are called

(A) neutrons.(B) protons.(C) electrons.(D) quanta.

Answer: (C) electrons.

• An atomic sub-particle that carries no electrical charge is called a

(A) proton.(B) neutron.(C) quantum.

Answer: (B) neutron.

• An universal law that applies to electrical charges states that

(A) like charges attract.(B) unlike charges attract.(C) like charges neutralise.(D) unlike charges neutralise.

Answer: (B) unlike charges attract.

10 The outermost shell of an atom is called its

(A) k' shell.(B) l' shell.(C) m' shell.(D) valence shell'.

Answer: (D) valence shell'.

11 The chemical and electrical properties of an atom is determined by its Stuvia.com - The Marketplace to Buy and Sell your Study Material

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Stuvia.com - The Marketplace to Buy and Sell your Study Material (A) k' shell.(B) l' shell.(C) m' shell.(D) valence shell'.

Answer: (D) valence shell'.

12 An electrically-charged atom is termed

(A) an 'ion'.(B) a 'positive ion'.(C) a 'negative ion'.(D) a 'positron'.

Answer: (A) an 'ion'.

13 A 'positive ion' is an atom with

(A) more electrons than protons.(B) more protons than neutrons.(C) more protons than electrons.(D) more electrons than neutrons.

Answer: (C) more protons than electrons.

14 A 'positive ion' will tend to attract

(A) protons.(B) electrons.(C) neutrons.(D) other atoms.

Answer: (B) electrons.

15 A 'free electron' is an electron released from an atom's

(A) k' shell.(B) l' shell.(C) m' shell.(D) valence' shell

Answer: (D) valence' shell

16 If the outer shell of an atom is less than half full, it will tend to

(A) attract free electrons.(B) lose electrons.(C) be electrically negative.(D) be electrically positive.Stuvia.com - The Marketplace to Buy and Sell your Study Material

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Stuvia.com - The Marketplace to Buy and Sell your Study MaterialAnswer: (B) lose electrons.

17 If the outer shell of an atom is more than half full, it will tend to

(A) attract free electrons.(B) lose electrons.(C) be electrically negative.(D) be electrically positive.

Answer: (A) attract free electrons.

18 In metals, an electric current is

(A) a rapid drift of electrons from negative to positive.(B) a rapid drift of electrons from positive to negative.(C) an extremely-slow drift of electrons from negative to positive.(D) an extremely-slow drift of electrons from positive to negative.

Answer: (C) an extremely-slow drift of electrons from negative to positive.

19 A general definition of electric current is

(A) a drift of free electrons in a conductor.(B) a drift of electric charges in a conductor.(C) a drift of electrons from positive to negative.(D) a drift of ions from positive to negative.

Answer: (B) a drift of electric charges in a conductor.

20 Silver, copper,and aluminium are examples of practical

(A) semiconductors.(B) conductors.(C) insulators.(D) compounds.

Answer: (B) conductors.

21 Ceramics, glass, and plastics are examples of practical

(A) semiconductors.(B) conductors.(C) insulators.(D) compounds.

Answer: (C) insulators.

22 An electrical conductor is normally electrically

(A) positive.(B) negative. Stuvia.com - The Marketplace to Buy and Sell your Study Material

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