Question

What is the reason to pivot the compass needle on a sharp pin?

• A. To minimise the magnetic effect on the pin
• B. To maximize the magnetic effect on the pin
• C. To minimise the friction between the pin and the compass needle
• D. To ensure that the compass needle will not drop from the pivoted point

Answer 1

The correct option is C To minimise the friction between the pin and the compass needle

As the compass is used to test for the magnetic force of earth and other material which is some what very less thus, needs to keep the friction least thus sharp pin is used to lower contact area and thus friction force.