Book Description

Unit 6: Electrostatics and Electric Circuit Workbook 6.1 Coulomb’s Law Workbook Multiple Choice Questions 1.

Two point charges are separated by a distance r.

If the distance between them is doubled, the electrostatic force between them becomes: (A) Twice as large (B) Half as large (C) Four times as large (D) One-quarter as large Answer: (D) Explanation: Coulomb’s Law states that the force is inversely pro portional to the square of the distance (F ∝ 1/r2).

If the distance r becomes 2r, the force becomes proportional to 1/(2r)2 = 1/(4r2), which is one-quarter of the original force. 2.

The fundamental property that dictates whether two charges attract or repel is: (A) Their mass (B) Their size (C) Their sign (positive or negative) (D) Their location Answer: (C) Explanation: The law of electrostatics states that like charges repel and unlike charges attract.

This interaction is determined by the sign of the charges. 3.

The SI unit of electric charge is the: (A) Ampere (A) (B) Volt (V) (C) Ohm (Ω) (D) Coulomb (C) Answer: (D) Explanation: The Coulomb is the standard unit of electric charge. The Ampere is the unit of current, the Volt is the unit of electric potential, and the Ohm is the unit of resistance..

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