IGNOU PHE 7 2018 - A positive 20µC charge is placed at the centre of a circle of ra

Question

A positive 20µC charge is placed at the centre of a circle of radius 20 cm. If we move a positive 2µC charge once along the circumference of the circle, will any work be done in the process? Justify your answer

27 Jan 2018

Answer :

Word Count : 417

To determine if any work will be done when a positive 2 µC charge is moved along the circumference of the circle, let's break down the situation step by step. ### Step 1: Key Concepts - Electric Field Due to Point Charge: The electric field due to a point charge \(Q\) is given by Coulomb’s law: \[ E = \frac{kQ}{r^2} \] where: - \(E\) is the electric field, - \(k\) is Coulomb's constant (\(8.99 \times 10^9 \, \text{Nm}^2/\text{C}^2\)), - \(Q\) is the charge creating the field, - \(r\)

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