STATEMENT-1: The sensitivity of a moving coil galvanometer is increased by placing a suitable magnetic material as a core inside the coil.
and
STATEMENT-2: Soft iron has a high magnetic permeability and cannot be easily magnetized or demagnetized.
← IIT-JEE 2008 · Paper 2
PhysicsAssertion and reason+3 / -1Question 35 of 66
IIT-JEE 2008 · Paper 2, Physics question 35
Answer and worked solution
Official answer: C
Statement 1. A soft-iron core concentrates the field in the coil region, increasing the torque per unit current: higher sensitivity. True.
Statement 2. Soft iron has high permeability and is easily magnetised and demagnetised (low retentivity and coercivity). The statement says the opposite. False.
(C)
Topics:Moving coil galvanometer