Q:1. Ans:-soft iron is used to make electromagnet as it gains and losses magnetism quickly depending on existence of magnetic field.
Q:2.Ans:- properties:-
each line is a closed and continuous curve .
they originate from the worth pole north and south.
they will never intersect each other .
Q:3 Ans:-
Q:4.answer:- when the direction of magnetic field and electric current are perpendicular.
Q:5 Answer:- right hand thumb rule .
Q:7 Answer :- the right -hand thumb rule indicates the direction of the magnetic field in a direction of the current .
in which our thumb shows the direction of force and middle finger shows the direction of the current and our first finger shows the direction of magnetic field .
Q:8 Answer:- the phenomenon of producing induced current in a closed coil placed in a changing magnetic field is called electromagnetic induction.
Name = Divyansh Parmar
class= 10th
roll no.= 1007
subject = physics
date = 16/01/2021
