Two magnets are used to magnetize a soft iron bar PQ as i...
Two magnets are used to magnetize a soft iron bar PQ as illustrated in the diagram given. The correct polarity at P and Q respectively
S and N
N and N
S and S
N and S
Correct answer is B
No explanation has been provided for this answer.
A bar magnet is most effectively demagnetized by ...
The surfaces of conveyor belts are made rough so as to? ...
The magnification of an object 2cm tall when placed 10cm in front of a plane mirror is ...
The main reason for making the cover of a vacuum flask airtight is to prevent heat loss by ...
A galvanometer of resistance 20Ω is to be provided with a shunt that 110 of th...