Horizontal equipotential lines on a page are labeled (from top to bottom) 100 V, 90…
PHYSICS · Single correct · A Level · Physics · Fields and their consequences · Fields and their consequences
Problem
Horizontal equipotential lines on a page are labeled (from top to bottom) 100 V, 90 V, 80 V, and so on. Point P lies midway between the 100 V and 90 V lines, which are 5 mm apart. Point Q lies midway between the 70 V and 60 V lines, which are 2 mm apart. Which of the following correctly compares the electric field magnitudes at the two points?
(a) ∣E∣P>∣E∣Q because the electric field is stronger where equipotential lines are farther apart
(b) ∣E∣P>∣E∣Q because point P is at a higher electric potential than point Q
(c) ∣E∣P<∣E∣Q because the equipotential lines are closer together near Q
(d) ∣E∣P=∣E∣Q because the potential difference between adjacent lines is 10V in both regions