Home › Karnataka PUC II › physics › electrostatic_potential_capacitance › If a charge q is moved through a potential diffe…
If a charge q is moved through a potential difference V, the work done by the external force is
Aq / V
BV / q
Cq² · V
Dq · V
Answer & Solution
Correct answer: D. q · V
By definition of potential, W_ext = qΔV. This is also why 'electron-volt' (the work done in moving one e through 1 V) is a unit of energy.
Related questions
Choose the INCORRECT statement about electric potential.A charge Q = 4 × 10⁻⁷ C is at the origin. The work done in bringing a small test charge q The work required to assemble a system of two point charges q₁ and q₂ separated by distancA hollow charged conductor encloses an empty cavity. The electric field inside the cavity Two charges +q and −q are placed at distance 2a. The electric potential V at a point on thWhich property does NOT necessarily hold for a charged conductor in electrostatic equilibrThe relation between electric field E and potential V along a direction r isThe electric potential due to a short dipole at large distances falls off with distance r