Question Detail

PHY 102 Test Compilation PHY 102 12 Objective Question

Question

The constant ke, which appears in Coulomb's law formula, is equivalent dimensionally to which of the following?
Options
A N·m/C
B N/C
C N·m²/C²
Correct Answer
D N/C²
Correct Answer

Option C is the correct answer.

Detailed Explanation

Coulomb's Law states F = ke * |q1q2| / r², where F is force, q1 and q2 are charges, and r is the distance between them.Rearranging the formula to solve for ke: ke = F * r² / (q1q2).Substituting the SI units: ke = (Newtons) * (meters)² / (Coulombs * Coulombs) = N·m²/C².

Hint

Rearrange Coulomb's law to isolate the constant ke and then substitute the SI units for each variable.

Question Info