Physics
Grade-10
Easy
Question
A soft iron bar is inserted inside a current-carrying solenoid. The magnetic field inside the solenoid:
- Will decrease
- Will increase
- Will become zero
- Will remain the same
Hint:
- This soft iron core helps to concentrate all the magnetic lines of forces through the solenoid so that the magnetic field is uniform at the cross section of the core.
The correct answer is: Will increase
- When a soft iron rod also known as the core is inserted inside a solenoid then the strength of the magnetic field increases because the iron ore gets magnetized due to magnetic induction and this combination of the solenoid and the soft iron core is called an electromagnet
- This soft iron core helps to concentrate all the magnetic lines of forces through the solenoid so that the magnetic field is uniform at the cross section of the core.
- Hence we can say when an iron core is inserted in a coil carrying current, the strength of its magnetic field will increase.
Related Questions to study
Physics
The magnetic field lines inside a long current-carrying solenoid are approximately-
The magnetic field lines inside a long current-carrying solenoid are approximately-
PhysicsGrade-10
Physics
The front face of a circular wire-carrying current behaves like a north pole. The direction of current in this face of the circular wire is:
The front face of a circular wire-carrying current behaves like a north pole. The direction of current in this face of the circular wire is:
PhysicsGrade-10
Physics
Magnetic field due to a current through a conducting loop depends on:
Magnetic field due to a current through a conducting loop depends on:
PhysicsGrade-10
Physics
The magnetic field strength due to a solenoid carrying current:
The magnetic field strength due to a solenoid carrying current:
PhysicsGrade-10
Physics
The strength of the magnetic field inside a long current carrying solenoid is:
The strength of the magnetic field inside a long current carrying solenoid is:
PhysicsGrade-10
Physics
An electromagnet is based on:
An electromagnet is based on:
PhysicsGrade-10
Physics
Read the following statements and choose the correct option:
Assertion: The strength of an electromagnet depends on the magnitude of current flowing through the solenoid.
Reason: Electromagnet is a permanent magnet.
Read the following statements and choose the correct option:
Assertion: The strength of an electromagnet depends on the magnitude of current flowing through the solenoid.
Reason: Electromagnet is a permanent magnet.
PhysicsGrade-10
Physics
Match the following with the correct response.
(1) Magnetic field inside the solenoid (A) Small bar magnet capable of rotating freely
(2) Compass needle (B) Temporary magnet
(3) Solenoid with soft iron core (C) Uniform
Match the following with the correct response.
(1) Magnetic field inside the solenoid (A) Small bar magnet capable of rotating freely
(2) Compass needle (B) Temporary magnet
(3) Solenoid with soft iron core (C) Uniform
PhysicsGrade-10
Physics
Read the following statements and choose the correct option:
Statement A: The magnetic field produced by a current-carrying loop has no poles.
Statement B: Like poles of magnets repel each other.
Read the following statements and choose the correct option:
Statement A: The magnetic field produced by a current-carrying loop has no poles.
Statement B: Like poles of magnets repel each other.
PhysicsGrade-10
Physics
The magnetic field lines outside a solenoid carrying current:
The magnetic field lines outside a solenoid carrying current:
PhysicsGrade-10
Physics
The material of the core of an electromagnet is generally:
The material of the core of an electromagnet is generally:
PhysicsGrade-10
Physics
Electromagnet loses its magnetic property when:
Electromagnet loses its magnetic property when:
PhysicsGrade-10
Physics
A bar magnet is equivalent to:
A bar magnet is equivalent to:
PhysicsGrade-10
Physics
The nature of magnetic field line passing through the center of current carrying circular loop is:
The nature of magnetic field line passing through the center of current carrying circular loop is:
PhysicsGrade-10
Physics
The symbol ⊗ shows that there is:
The symbol ⊗ shows that there is:
PhysicsGrade-10
