A coil is placed in a magnetic field such that its plane is perpendicular to the field. Magnetic flux through the coil can be changed by: A. changing the magnitude of B, B. changing the area of the coil within the field, C. changing the angle between the field and the plane of the coil, D. abruptly reversing the field direction without changing its magnitude. Choose the most appropriate answer.
Options

Question

A coil is placed in a magnetic field such that its plane is perpendicular to the field. Magnetic flux through the coil can be changed by: A. changing the magnitude of B, B. changing the area of the coil within the field, C. changing the angle between the field and the plane of the coil, D. abruptly reversing the field direction without changing its magnitude. Choose the most appropriate answer.

Options

G1 Physics · Accepted Answer

Magnetic flux is Φ = BA cos θ where θ is the angle between B and the area vector. Changing B, area A, or orientation changes Φ. In the wording of the source question, the most appropriate listed choice is A, B and C. Hence option B.