2023
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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0
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negative infinity
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positive infinity
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It depends on whether its a positive or negative charge
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Detailed explanation-1: -Note: The electric potential is at infinity is zero (as, r = ∞ in the above formula).
Detailed explanation-2: -The electric potential at infinity is assumed to be zero. In electrodynamics, when time-varying fields are present, the electric field cannot be expressed only in terms of a scalar potential. Instead, the electric field can be expressed in terms of both the scalar electric potential and the magnetic vector potential.
Detailed explanation-3: -When charged particles are separated by an infinite distance, the electric potential energy of the pair is zero. When the particles are brought close, the electric potential energy of a pair with the same sign is positive, whereas the electric potential energy of a pair; with opposite signs is negative.
Detailed explanation-4: -(b) No, just because the electric potential is zero at a particular point, it does not necessarily mean that the electric field is zero at that point. A good example is the case of a dipole, which is two charges of the same magnitude, but opposite sign, separated by some distance.