Exams › NEET › Physics

Assertion (A): To protect any instrument from external magnetic field, it is put inside an iron box Reason (R) : Iron is a ferromagnetic substance

1. Both A and R are true and R is the correct explanation of A
2. Both A and R are true and R is not correct explanation of
3. A is true, but R is false
4. A is false, but R is true

Correct answer: Both A and R are true and R is the correct explanation of A

Solution

Both statements are true: iron is ferromagnetic, so it has very high magnetic permeability. That makes an iron enclosure divert external magnetic field lines through itself, reducing the field inside and protecting the instrument.

Related NEET Physics questions

• Sensitivity of a moving coil galvanometer can be increased by Fill in the blank.
• Assertion The sensitivity of a moving coil galvanometer is increased by placing a suitable magnetic material as a core inside the coil. Reason Soft iron has a high magnetic permeability and cannot be easily magnetized or demagnetized.
• The temperature at which the domain structure gets destroyed and ferromagnetic substance is converted into paramagnetic substance is called as
• Two straight parallel wires carrying current in the opposite directions repe each other, because of
• Assertion A current carrying conductor experiences a force in a magnetic field. Reason The net charge on a current carrying conductor is zero.
• Which of the following statement regarding transformer is incorrect?

⚔️ Practice NEET Physics free + battle 1v1 →