Coulombs Law MCQs | Coulombs Law Multiple Choice Questions and Answers

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Questions
1 Two charges 1C and -4C exists in air. What is the direction of force?
A Away from 1C
B Away from -4C
C From 1C to -4C
D From -4C to 1C

Answer: From 1C to -4C
2 Find the force between two charges when they are brought in contact and separated by 4cm apart, charges are 2nC and -1nC, in μN.
A 1.44
B 2.44
C 1.404
D 2.404

Answer: 1.404
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3 The Coulomb law is an implication of which law?
A Ampere law
B Gauss law
C Biot Savart law
D Lenz law

Answer: Gauss law
4 For a charge Q1, the effect of charge Q2 on Q1 will be,
A F1 = F2
B F1 = -F2
C F1 = F2 = 0
D F1 and F2 are not equal

Answer: F1 = -F2
5 Which Of The Following Is A Vector Quantity
A Electrical Potential
B Electrical Field Intensity
C Electric Charge
D All Of The Above

Answer: Electrical Field Intensity
6 Two capacitor of each breakdown voltage 500 V are connected parallel. The breakdown rating of the combination will be
A 500 V
B 500√2 V
C 1000 V
D 2500 V

Answer: 500 V
7 A charge which when placed in vacuum from an equal and similar charge repels with a force of 9000 N, is known as
A coulomb
B milli coulomb
C micro coulomb
D None of the above

Answer: micro coulomb
8 Electric lines of force about a negative point charge are
A circular, anticlockwise
B circular, clockwise
C radial, inward
D radial, outward

Answer: radial, inward
9 Two charges are placed at a certain distance apart. A brass sheet is placed between them. The force between them will
A Increase
B Decrease
C Remains Unchanged
D All the above

Answer: Decrease
10 A point charge in space is attracted towards a dielectric material because of the
A Phenomenon Of Dielectric Polarization
B Maximization Of Electrostatics Flux
C Dielectric Hysteresis
D None Of The Above

Answer: Maximization Of Electrostatics Flux
11 A region around a stationary electric charge has
A Magnetic Field
B Electric Field
C Both Electric And Magnetic Field
D Neither Electric Nor Magnetic Field

Answer: Electric Field
12 The force of attraction or repulsion between two charges q1 and q2 at a distance d meters apart is proportional to the product of charges q1 and q2 and is inversely proportional to the distance square between the two charges. Above statement is attributed as:
A Lenz’s law
B Faraday law
C Coulomb’s law
D Maxwell’s law

Answer: Coulomb’s law
13 A positive and a negative charge are initially 4 cm apart. When they are moved closer together so that they are now only 1 cm apart, the force between them will be
A 16 times larger than before
B 8 times larger than before
C 4 times larger than before
D 4 times smaller than before

Answer: 16 times larger than before
14 Two charged spheres of radii 10 cm and 15 cm are connected by a thin wire. No current will flow if they have
A The Same Charge
B The Same Energy
C The Same Field On Their Surface
D The Same Potential

Answer: The Same Potential
15 The relative permittivity of most materials lies between
A 20 and 100
B 10 and 20
C 100 and 200
D 1 and 10

Answer: 1 and 10
16 If the relative permittivity of the medium increases, the electric intensity at a point due to a given charge
A Decreases
B Increases
C Remains The Same
D All of the above

Answer: Decreases
17 When the potential difference across the electric field intensity between the parallel plate air capacitor is doubled, plates
A Is Not Change
B Is Halved
C Is Doubled
D Is Independent Of The Potential Difference

Answer: Is Independent Of The Potential Difference
18 One farad is the same as
A one coulomb/volt
B one joule/volt
C one joule/coulomb
D one coulomb/joule

Answer: one coulomb/volt
19 Electric potential is a
A scalar quantity
B vector quantity
C dimensionless quantity
D none of the above

Answer: scalar quantity
20 The potential at a point due to a charge is 9 V. If the distance is increased three times, the potential at that point will be
A 27 V
B 3 V
C 12 V
D 18 V

Answer: 27 V

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