Physics Electrostatics KU 2024
PMDC Verified Question 10 of 131
Q.187 What does one Coulomb represent in terms of charges?
A
The amount of charge transported by a current of 1 Ampere in 1 second
B
The charge of 1 proton
C
The charge of 1 electron
D
The charge required to create a force of 1 Newton between two charges separated by 1 meter
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option A: The amount of charge transported by a current of 1 Ampere in 1 second
1. Concept:

The SI unit of charge (Coulomb) is actually a derived unit, officially defined through the macroscopic properties of flowing electric current (Amperes) and time.

2. Formula:

$$ Q = I \times t $$

3. Solution:

  • By standard SI definition, 1 Ampere represents 1 Coulomb of charge flowing past a specific point per second.


  • Therefore, multiplying 1 Ampere by 1 second inherently defines exactly 1 Coulomb.


4. Why other options are incorrect:

Options B and C refer to the elementary charge (\( 1.6 \times 10^{-19} \text{ C} \)). Option D describes an entirely different mathematical constraint (where \( F = k(1)^2/1^2 = 9 \times 10^9 \text{ N} \), not 1 N).

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