Question

which of the following pairs could we test the relationship between to examine circuits that produce magnetic fields?
wire angle and resistance
light brightness and voltage
ac voltage and magnetism
solar panels and voltage

Explanation:

To examine circuits producing magnetic fields, we need a pair directly linking an electrical circuit element to magnetism.

• Wire angle and resistance: Resistance depends on material, length, area, not angle, and this pair does not involve magnetism.
• Light brightness and voltage: This relates to electrical power in a light load, no connection to magnetic fields.
• AC voltage and magnetism: An alternating current (driven by AC voltage) in a circuit generates a magnetic field, so this pair directly tests the relationship between circuit behavior and magnetic field production.
• Solar panels and voltage: This focuses on voltage generation from light, no link to magnetic fields from circuits.

Answer:

AC voltage and magnetism