Ok, your middle finger is representing the conventional current, so your middle finger should be pointing downwards. Your index finger represents the direction of magnetic field (north pole to south pole), so point index finger towards your laptop screen/page. Now, which way is your thumb pointing at? It will be pointing right, so B would be the answer.
Ok, your middle finger is representing the conventional current, so your middle finger should be pointing downwards. Your index finger represents the direction of magnetic field (north pole to south pole), so point index finger towards your laptop screen/page. Now, which way is your thumb pointing at? It will be pointing right, so B would be the answer.