Important Basic Electrical MCQs
In this post, some of the important basic electrical mcqs are given. It includes atom, nucleus, mass of proton, charge of electron, shape of orbit, number of electrons in orbit, conducting material, positive charged, negative charged, unit of electric potential, definition of potential and potential of earth.
Basic Electrical MCQs 1 to 5
1 The central part of an atom is called as a
( a )Electron
( b )Proton
( c )Neutron
( d )Nucleus
Correct Answer ( d ): Nucleus
2 The neutrons have_____ charge.
( a )Positive
( b )Negative
( c )No
( d )None of the above
Correct Answer ( c ): No
The neutron has no charge, proton have positive charge and electrons have negative charge, those two charges balance each other.
3 The central part of nucleus consists of ______. ( Where P is protons, N is neutrons and e is electrons )
( a )P + N
( b )P + e
( c )N + e
( d )Only electrons
Correct Answer ( a ): P + N
The Centre of nucleus consists of proton and neutron, whereas electrons move in outer orbits.
4 The mass of proton is equal to _____ times mass of an electron.
( a )1480
( b )1840
( c )1890
( d )1980
Correct Answer ( b ): 1840
5 The charge of electron is
( a )1.602 x 10 –9 Coulomb
( b )1.602 x 10 –19 Coulomb
( c )1.802 x 10 – 6 Coulomb
( d )1.902 x 10 –19 Coulomb
Correct Answer ( b ): 1.602 x 10 –19 Coulomb
Basic Electrical MCQs 6 to 10
6 The atomic weight of an atom is equal to sum of
( a )Protons + neutrons
( b )Protons + electrons
( c )Neutrons + electrons
( d )Only electrons
Correct Answer ( a ): Protons + neutrons
7 The shape of orbit is
( a )Circular
( b )Elliptical
( c )Parabola
( d )Hyperbola
Correct Answer ( b ): Elliptical
8 The atomic number of an atom is
( a )Number of protons
( b )Number of electrons
( c )Number of neutrons
( d )Either ( a ) or ( b )
Correct Answer ( d ): Either ( a ) or ( b )
9 The number of electrons in any orbit is equal to ______. (Where n is orbit number)
( a )n2
( b )2n2
( c )4n2
( d )8n3
Correct Answer ( b ): 2n2
10 The numbers of electrons in the last orbit are always
( a )Equal to 8
( b )Less than 8
( c )Greater than 8
( d )Either ( a ) or ( b )
Correct Answer ( d ): Either ( a ) or ( b )
Basic Electrical MCQs 11 to 15
11 Which of the following is incomplete orbit of an atom?
( a )First
( b )Second
( c )Third
( d )Last
Correct Answer ( d ): Last
12 Which of the following orbit of an atom has poor binding force with its own nucleus?
( a )Inner most
( b )Middle
( c )Outer most
( d )Central
Correct Answer ( c ): Outer most
The inner most orbit has higher binding force as compared to outer orbit.
13 An atom of any substance is
( a )Positive charged
( b )Negative charged
( c )Neutral
( d )Either ( a ) or ( b )
Correct Answer ( c ): Neutral
14 Which of the following is highly conductive material?
( a )Copper
( b )Aluminum
( c )Silver
( d )Nickel
Correct Answer ( c ): Silver
The conductivity of silver is higher than that of aluminum and copper.
Basic Electrical MCQs 16 to 20
15 One atom of metal provides only _____ free electron.
( a )Zero
( b )One
( c )Two
( d )Three
Correct Answer ( b ): One
16 When some electrons are removed from matter it becomes
( a )Positive charged
( b )Negative charged
( c )Neutral
( d )None of the above
Correct Answer ( a ): Positive charged
17 A body has negative charge of one coulomb, it means that the body has _____ of 6.28 × 1018 electrons.
( a )Deficit
( b )Excess
( c )Either ( a ) or ( b )
( d )None of the above
Correct Answer ( b ): Excess
18 The unit of electric potential is
( a )Joule / coulomb
( b )Volt
( c )Joule / second
( d )Both ( a ) and ( b )
Correct Answer ( d ): Both ( a ) and ( b )
Potential = Work done / charge
19 The ability of charged body to do work is called as
( a )Current
( b )Electrical potential
( c )Potential difference
( d )Energy
Correct Answer ( b ): Electrical potential
20 The potential of earth is affected by
( a )Positive charge
( b )Negative charge
( c )Both ( a ) and ( b )
( d )None of the above
Correct Answer ( d ): None of the above
The potential of earth remains constant and it is equal to zero.
More Details About Potential of Earth