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


7.
Calculate the potential at a point P due to a charge of 4 × 10⁻⁷ C located 9 cm away:
A.
4 × 10³ V
B.
4 × 10⁴ V
C.
4 × 10⁵ V
D.
4 × 10⁶ V
😑 View Answer Rough Work Error
ANSWER :
B. 4 × 10⁴ V
8.
Work done in bringing a charge of 2 × 10⁻⁹ C from infinity to a point where potential is 4 × 10⁴ V:
A.
8 × 10⁻⁴ J
B.
2 × 10⁻⁴ J
C.
4 × 10⁻⁵ J
D.
8 × 10⁻⁵ J
😑 View Answer Rough Work Error
ANSWER :
D. 8 × 10⁻⁵ J
9.
For a positive point charge, electric potential V at distance r is:
A.
Positive and decreases as 1/r²
B.
Positive and decreases as 1/r
C.
Zero everywhere
D.
Negative and decreases as 1/r
😑 View Answer Rough Work Error
ANSWER :
B. Positive and decreases as 1/r
10.
For a negative point charge, the potential at distance r is:
A.
Zero everywhere
B.
Negative everywhere with V → 0 as r → ∞
C.
Positive everywhere
D.
Negative only inside a certain radius, positive outside
😑 View Answer Rough Work Error
ANSWER :
B. Negative everywhere with V → 0 as r → ∞
11.
How does electrostatic potential V vary with distance r compared to electric field E from a point charge?
A.
V varies as 1/r, while E varies as 1/r²
B.
Both V and E vary as 1/r
C.
Both V and E vary as 1/r²
D.
V varies as 1/r², while E varies as 1/r
😑 View Answer Rough Work Error
ANSWER :
A. V varies as 1/r, while E varies as 1/r²
12.
If the distance from a point charge is doubled, the electric potential becomes:
A.
Double
B.
Four times
C.
One-fourth
D.
Half
😑 View Answer Rough Work Error
ANSWER :
D. Half