Electric Potential (Calculation for a point charge, Electric Dipole and System of Charges... ) NEET Questions

Physics - Electrostatics

Electric Potential (Calculation for a point charge, Electric Dipole and System of Charges... ) MCQ Questions


1.
The electric potential at a distance r from a point charge Q is:
A.
Q / (4πε₀r)
B.
Q / (4πε₀r²)
C.
Q / (ε₀r)
D.
Q / (8πε₀r³)
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ANSWER :
A. Q / (4πε₀r)
2.
An electron is moved from a point at a higher potential to a lower potential. Its potential energy:

NEET - 2022

A.
Increases
B.
Decreases
C.
Remains constant
D.
Becomes zero
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ANSWER :
B. Decreases
3.
For an electric dipole, the electric potential at a point on its axial line is proportional to:
A.
1/r²
B.
1/r³
C.
r
D.
r²
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ANSWER :
B. 1/r³
4.
Equipotential surfaces are:
A.
Independent of the electric field
B.
Parallel to electric field lines
C.
Randomly oriented
D.
Always perpendicular to electric field lines
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ANSWER :
D. Always perpendicular to electric field lines
5.
The work done in moving a charge between two points on an equipotential surface is:
A.
Depends on the path taken
B.
Maximum
C.
Equal to the potential difference
D.
Zero
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ANSWER :
D. Zero
6.
The potential energy of a system of two point charges is:

NEET - 2018

A.
Directly proportional to the product of the charges
B.
Inversely proportional to the distance between them
C.
Depends on the medium between the charges
D.
All of the above
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ANSWER :
D. All of the above