Magnetism and Electromagnetism
Paramagnetic materials have relative permeability

equal to that ferromagnetic mate rials
slightly more than unity
equal to unity
slightly less than unity

ANSWER DOWNLOAD EXAMIANS APP

Magnetism and Electromagnetism
A certain amount of current flows through a ring shaped coil with fixed number of turns. How does the magnetic induction B varies inside the coil if an iron core is threaded into coil without dimensional change of coil?

Remains same
First increases and then decreases depending on the depth of iron in¬sertion
Decreases
Increases

ANSWER DOWNLOAD EXAMIANS APP