Find work done to bring a +2 µC charge from infinity to a point where V = 50 V:
A10 µJ
B100 µJ
C2.5 µJ
D25 µJ
Answer & Solution
Correct answer: B. 100 µJ
W = qV = (2 × 10⁻⁶)(50) = 10⁻⁴ J = 100 µJ. (Work done by external agent to bring positive charge into a positive potential region.)
Related questions
If a positive point charge is placed at the centre of a spherical conducting shell of radiThe SI unit of electric field isFor a charge distribution with volume density ρ, the total charge Q equalsThe electric flux through a closed surface enclosing a charge of +5 μC is (ε₀ = 8.85 × 10⁻Two charges +q and −q of equal magnitude are placed at the corners A and B of an equilaterThe principle of quantisation of electric charge is stated asAn electric dipole in a uniform electric field E experiencesThe electric field on the axial line of a short electric dipole at distance r is