Question
Download Solution PDFEquipotential surfaces are shown in figure. Then the electric field strength will be
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
Electric field strength is perpendicular to the equipotential surface and is given by the negative gradient of the potential.
Electric field strength, E = - (dV / dx)
Calculation:
Given the potential difference between the equipotential surfaces is 10 V and the distance between them is 0.05 m.
⇒ E = - (10 / 0.05)
⇒ E = - 200 V/m
The direction of the electric field is perpendicular to the equipotential surfaces and towards decreasing potential.
Given that the angle with the X-axis is 120°.
Hence, the electric field strength is 200 V/m at an angle 120° with the X-axis.
∴ The correct answer is option 3.
Last updated on Jul 3, 2025
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