Magnetism and Electromagnetism
Which of the following type of materials are not very important for engineering applications?

None of the listed here
Ferro magnetic material
Paramagnetic material
Diamagnetic material

ANSWER DOWNLOAD EXAMIANS APP

Magnetism and Electromagnetism
The left hand rule correlates to

Current, magnetic field and direction of force on a conductor
Self induction, mutual induction and direction of force on a conductor
Magnetic field, electric field and direction of force on a conductor
Current, induced e.m.f. and direction of force on a conductor

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?

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

ANSWER DOWNLOAD EXAMIANS APP