For which of the following physical quantities could 'ampere-second' be the derived unit?

Multiple Choice Options

A
Electric Charge
✓ Correct Option
B
Reluctance
C
Power
D
Energy

Detailed Technical Solution & Explanation

Electric current ( $I$ ) is defined as the rate of flow of electric charge ( $Q$ ) with respect to time ( $t$ ): $I = Q / t \implies Q = I \times t$ . Therefore, $1 \text{ Coulomb (Charge)} = 1 \text{ Ampere} \times 1 \text{ Second}$ .

Option Analysis:

•

Option A (Electric Charge): Correct. Charge equals current multiplied by time (

Q = I \cdot t

), with unit Ampere-second (Coulomb).

•

Option B (Reluctance): Measured in Ampere-turns per Weber (

\text{A-t/Wb}

\text{H}^{-1}

•

Option C (Power): Measured in Watts (Joules/second or Volt-Amperes).

•

Option D (Energy): Measured in Joules (Watt-seconds or Volt-Ampere-seconds).

Reference: Mock Test 03NEC Licensure Syllabus

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ACtE08 · Chapter 8Mock Test 03🏛️ Past Licensure QuestionID: 13978dbf