A small compass needle is placed 2 cm east of an isolated long straight conductor…
PHYSICS · Multi-part · A Level · Physics · Fields and their consequences · Fields and their consequences
Problem
A small compass needle is placed 2 cm east of an isolated long straight conductor that carries a current of 5 A directed from south to north.
(a) Predict the initial direction in which the north pole of the compass needle will deflect.
(b) Give a reason for your answer in part (a).
(c) How will the magnitude of the deflection change if the current in the conductor is doubled while all other conditions remain the same? Explain your answer.