Physics
Grade-10
Easy
Question
A soft iron bar is inserted inside a current-carrying solenoid. The magnetic field inside the solenoid:
- Will become zero
- Will decrease
- Will remain the same
- Will increase
Hint:
When a soft core of iron bar is inserted inside the solenoid, their combination creates an electromagnet.
The correct answer is: Will increase
When a soft core of iron is inserted into a solenoid, its magnetic field increases.
- When a soft core of iron bar is inserted inside the solenoid, their combination creates an electromagnet.
- A bar magnet's magnetic field and the magnetic field created by a current-carrying solenoid are comparable.
- The iron is magnetized with the magnetic field of the solenoid.
- The magnetic field within a current-carrying solenoid will expand when a soft iron bar is added.
- Thus, this combination of iron with solenoid increases the magnetic field.
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