In a circuit consisting of a long bulb and two flashlight batteries in series the conventional current is about 0.1 ampere. What is the magnetic field 5 mm from the wire? (This is about how far away...

In a circuit consisting of a long bulb and two flashlight batteries in series the conventional current is about 0.1 ampere.

What is the magnetic field 5 mm from the wire? (This is about how far away the compass needle is when you place the

wire on top of the compass.) Is this a big or a small field?