Physics
Grade-10
Easy
Question
In a magnetic field, a rectangular coil of copper wires is rotated. Once in each rotation, the direction of the induced current changes.
- One revolution
- One fourth revolution
- Half revolution
- Two revolutions
Hint:
A rectangular coil fixed in an electrical generator in a magnetic field, the coil rotates to enhance the current flow which is reversed in each half revolution.
The correct answer is: Half revolution
In a magnetic field, a rectangular coil of copper wires is rotated. Once in each rotation, the direction of the induced current changes in half revolution.
- The rectangular coil in the generator provides a rotational shift to the induced current.
- It reverses the direction of the current in each half-cycle.
- So the direction of induced current changes in half revolution.
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