A loop of wire is rotated in a uniform magnetic field. What is the effect on the induced current? (2019)
Practice Questions
1 question
Q1
A loop of wire is rotated in a uniform magnetic field. What is the effect on the induced current? (2019)
It remains constant
It reverses direction
It increases
It decreases
As the loop rotates, the angle between the magnetic field and the normal to the loop changes, which causes the direction of the induced current to reverse periodically.
Questions & Step-by-step Solutions
1 item
Q
Q: A loop of wire is rotated in a uniform magnetic field. What is the effect on the induced current? (2019)
Solution: As the loop rotates, the angle between the magnetic field and the normal to the loop changes, which causes the direction of the induced current to reverse periodically.
Steps: 7
Step 1: Understand that a loop of wire is placed in a magnetic field.
Step 2: Recognize that when the loop rotates, the position of the loop changes.
Step 3: Know that the magnetic field has a direction, and the loop has a normal (an imaginary line perpendicular to the surface of the loop).
Step 4: As the loop rotates, the angle between the magnetic field and the normal to the loop changes.
Step 5: Remember that a changing angle in a magnetic field can induce an electric current in the wire.
Step 6: Realize that when the angle changes, the direction of the induced current also changes.
Step 7: Conclude that the induced current reverses periodically as the loop continues to rotate.
