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A charge of 1.6 × 10\(^{-10}\) C is placed in a uniform electric field of intensity...

Physics
WAEC 2025

A charge of 1.6 × 10\(^{-10}\) C is placed in a uniform electric field of intensity 2.0 × 10\(^5\) NC\(^{-1}\). What is the magnitude of the electric force exerted on the charge?

  • A. 3.2 × 10\(^{-5}\) N.
  • B. 3.2 × 10\(^5\) N.
  • C. 1.8 × 10\(^{-5}\) N.
  • D. 1.8 × 10\(^5\) N.
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Correct Answer: Option A
Explanation

The force exerted on a charge in an electric field is given by the formula F = qE, where F is the force, q is the charge, and E is the electric field intensity.

Given: the charge q is 1.6 × 10\(^{-10}\) C, and the electric field intensity E is 2.0 × 10\(^5\) NC\(^{-1}\).

Substituting these values into the formula gives F = (1.6 × 10\(^{-10}\) C) × (2.0 × 10\(^5\) NC\(^{-1}\)) = 3.2 × 10\(^{-5}\) N.


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