Which description best describes a region where the magnetic field has the same strength at all points?

Which description best describes a region where the magnetic field has the same strength at all points?

• A. Nonuniform field
• B. Uniform field
• C. Alternating field
• D. Weak field

Answer: (B)

The idea being tested is what it means for a magnetic field to have the same strength at every point. When the strength is the same everywhere, the field is called uniform. In a uniform magnetic field, the lines of force would be parallel and evenly spaced, showing constant magnitude and same direction throughout the region. If the field were nonuniform, the spacing of the lines would vary, indicating changes in strength from place to place. An alternating field describes a field that changes with time rather than staying the same across space, and a weak field just means the field has a small strength, not that it is the same everywhere. So the description that fits same strength at all points is a uniform magnetic field.

The idea being tested is what it means for a magnetic field to have the same strength at every point. When the strength is the same everywhere, the field is called uniform. In a uniform magnetic field, the lines of force would be parallel and evenly spaced, showing constant magnitude and same direction throughout the region. If the field were nonuniform, the spacing of the lines would vary, indicating changes in strength from place to place. An alternating field describes a field that changes with time rather than staying the same across space, and a weak field just means the field has a small strength, not that it is the same everywhere. So the description that fits same strength at all points is a uniform magnetic field.