Physics
Grade-10
Easy
Question
The magnetic field strength due to a solenoid carrying current:
- Is zero everywhere
- Decreases outside
- Increases outside
- Is the same at all points.
Hint:
The magnetic field lines inside a current carrying solenoid are parallel and equidistant which means the strength of magnetic field is uniform inside the solenoid
The correct answer is: Decreases outside
- The magnetic field inside a solenoid is proportional to both the applied current and the number of turns per unit length. There is no dependence on the diameter of the solenoid, and the field strength doesn't depend on the position inside the solenoid, i.e., the field inside is constant.
- The magnetic field lines inside a current carrying solenoid are parallel and equidistant which means the strength of magnetic field is uniform inside the solenoid i.e. same at all points.
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