In which of the following cases is the magnetic field zero?

At the center of a current-carrying loop
Inside a solenoid with no current
Near a straight wire carrying current
At the midpoint between two parallel wires carrying equal currents in opposite directions

In which of the following cases is the magnetic field zero?

Step 1: Understand that a magnetic field is created around a wire when an electric current flows through it.
Step 2: Recognize that two parallel wires can create magnetic fields that interact with each other.
Step 3: If both wires carry equal currents but in opposite directions, their magnetic fields will oppose each other.
Step 4: Find the midpoint between the two wires. This is the point that is equidistant from both wires.
Step 5: At the midpoint, the magnetic fields from both wires will cancel each other out because they are equal in strength but opposite in direction.
Step 6: Conclude that the magnetic field is zero at this midpoint between the two wires.

No concepts available.