Home › Karnataka PUC II › Physics › Electric Charges and Fields › Two point charges of 2 μC each are placed 1 m ap…
Two point charges of 2 μC each are placed 1 m apart in vacuum. The magnitude of the Coulomb force between them is closest to
A3.6 × 10⁻² N
B9.0 × 10⁻³ N
C9.0 N
D3.6 × 10⁻³ N
Answer & Solution
Correct answer: A. 3.6 × 10⁻² N
F = (1/4πε₀)·q₁q₂/r² = 9×10⁹ × (2×10⁻⁶)² / 1² = 9×10⁹ × 4×10⁻¹² = 3.6×10⁻² N.
Related questions
A charged comb picks up small pieces of paper that carry no net charge, because the paper Compared with the tiny nucleus, the electrons around it form a cloud that is:Benjamin Franklin explained early observations by supposing that one type of charge stayedA test charge or a source charge moves, and as a result the force between them:If the two ends of a dipole can be pulled apart, induction can create charged objects withPlaced in a uniform field, such a dipole experiences a turning effect that changes its angTwo equal and opposite charges separated by a small distance form a dipole, characterised Where those lines are packed more densely, the field is: