Physics Electrostatics DUHS 2023
PMDC Verified Question 51 of 131
Q.168 The change in electric potential with respect to distance equals to:
A
Potential gradient
B
Amount of the charge
C
Potential difference
D
Surface charge density
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option A: Potential gradient
1. Concept:

In physics, any quantity's mathematical "rate of change with respect to distance" is referred to as its spatial gradient.

2. Formula:

$$ E = - \frac{\Delta V}{\Delta r} $$

3. Solution:

  • The term \( \Delta V / \Delta r \) evaluates how steeply the voltage drops off as you move through space.


  • This specific mathematical construct is formally titled the "Potential Gradient," and it is strictly equivalent to the magnitude of the Electric Field.


4. Why other options are incorrect:

Potential difference is just \( \Delta V \) without dividing by distance. Surface charge density is charge per unit area (\( Q/A \)).

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