What is the direction of field around a straight current-carrying wire?
سیدھی رو والی تار کے گرد میدان کی سمت کیا ہے؟
Solution & explanation
Concentric circles in planes perpendicular to the wire. Right thumb points along conventional current and curled fingers give field direction.
Independent study answer. Original textbook ↗ · English-medium printed page 137.