🔍 Key Concepts

• Magnetic field around a straight conductor and how it changes with electric current • Relationship between Ohm's Law (V = I × R) and magnetic fields • Which quantities (current, resistance, size of wire) actually CREATE the field vs. just affecting circuit behavior

💭 Think About

• If you keep the current the same but change the resistance, what happens specifically to the magnetic field strength around the wire? • Think about a simple wire with current flowing: what physical quantity flowing in the wire directly creates the magnetic field lines around it? • Does the wire’s diameter, by itself (with no change in current), guarantee a stronger magnetic field, or is something else more fundamental?

✅ Before You Answer

• Identify which option is expressed in amps (current) or clearly depends on current flowing through the conductor • Separate quantities that describe circuit behavior (like resistance and voltage) from those that directly control the magnetic field strength • Ask: if resistance changed but current stayed constant, would the magnetic field strength necessarily change?