Answer to Question #311491 in Electricity and Magnetism for Chemistry

Question

In the circuit shown in Fig. Q28.14, when switch S is suddenly closed, the wire L is pulled toward the lower wire carrying current I. Which (a or b) is the positive terminal of the battery? How do you know?

Answer 1

Answer

when switch S is suddenly closed, the wire L is pulled toward the lower wire carrying current I.a is the positive terminal of the battery

According to polarity of battery.