Question

Two equal point charges of 1uc each are located at points (I + j - k)m and (2i + 3j + k)m. What is the magnitude of electrostatic force between them?

Answer 1

Given : Two equal point charges of 1 μC each are located at points (i + j - k) m and (2i + 3j + k) m.

To find : The magnitude of electrostatic force between them.

solution : seperation between the charges , r = (2i + 3j + k) - (i + j - k)

= i + 2j + 2k

magnitude of r = |r| = √(1² + 2² + 2²) = 3 m

from coulomb's law, F = KQ₁Q₂/r²

here, Q₁ = Q₂ = 10^-6 C

so, F = (9 × 10^9 × 10^-6 × 10^-6)/(3)²

= 10¯³ N

Therefore magnitude of electrostatic force between them is 10¯³ N.

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