Electric Field (Electric field due to a Point Charge, Electric Field Lines... ) NEET Questions

Physics - Electrostatics

Electric Field (Electric field due to a Point Charge, Electric Field Lines... ) MCQ Questions


1.
The electric field produced by a point charge Q at a distance r in vacuum is given by E = (1/4πε₀)(Q/r²)r̂. If the distance is doubled, the electric field becomes:
A.
One-fourth of original
B.
Four times the original
C.
Half of original
D.
Double the original
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ANSWER :
A. One-fourth of original
2.
The SI unit of electric field is:
A.
Both N/C and V/m
B.
V/m only
C.
C/N
D.
N/C only
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ANSWER :
A. Both N/C and V/m
3.
A charge of +2 μC is placed at origin. The electric field at a point 30 cm away on x-axis is approximately:
A.
2 × 10⁵ N/C along +x axis
B.
2 × 10⁴ N/C along -x axis
C.
2 × 10⁵ N/C along -x axis
D.
2 × 10⁴ N/C along +x axis
😑 View Answer Rough Work Error
ANSWER :
A. 2 × 10⁵ N/C along +x axis
4.
The electric field due to a point charge has:
A.
No symmetry
B.
Planar symmetry
C.
Cylindrical symmetry
D.
Spherical symmetry
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ANSWER :
D. Spherical symmetry
5.
Electric field E at a point due to a source charge Q is defined as:
A.
Force per unit test charge placed at the point
B.
Force × distance
C.
Force per unit source charge
D.
Product of source and test charges
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ANSWER :
A. Force per unit test charge placed at the point
6.
The electric field at a point due to a point charge Q is independent of:
A.
Sign of Q
B.
Distance from Q
C.
Magnitude of test charge used
D.
Magnitude of Q
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ANSWER :
C. Magnitude of test charge used