Question

What happens to the force between magnetic poles when their pole strength and the distance between them are both doubled

• A. Force increases to two times the previous value
• B. No change
• C. Force decreases to half the previous value
• D. Force increases to four times the previous value

Answer 1

Answer: (B)

No change

Answer 2

$F \propto \frac { m _ { 1 } m _ { 2 } } { r ^ { 2 } }$