EASY
12th CBSE
IMPORTANT
Earn 100

Two equal and unlike poles placed 5 cm apart in air attract each other with a force of 14.4×10-4 N. How far from each other should they be placed so that the force of attraction will be 1.6×10-4 N?

Important Questions on Magnetism

EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 5 - Magnetism>Problems For Practice>Q 3
Two magnetic poles, one of which is 10 times as strong as the other, exert on each other a force equal to 9.604 mN, when placed 10 cm apart in air. Find the strength of the two poles.
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 5 - Magnetism>Problems For Practice>Q 4
Two like magnetic poles of strengths 5 Am and 20 Am are situated 1.0 m apart. At what point on the line joining the two poles, will the magnetic field be zero?
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 5 - Magnetism>Problems For Practice>Q 5
Two bar magnets of length 0.1 m and pole strength 75 Am each, are placed on the same line. The distance between their centres is 0.2 m. What is the resultant force due to one on the other when the north pole of one faces the south pole of the other and
 
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 5 - Magnetism>Problems For Practice>Q 5
Two bar magnets of length 0.1 m and pole strength 75 Am each, are placed on the same line. The distance between their centres is 0.2 m. What is the resultant force due to one on the other when the north pole of one faces the north pole of the other?
 
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 5 - Magnetism>Problems For Practice>Q 6
A magnetic dipole of length 15 cm has a dipole moment of 1.5 Am2 What is the pole strength?
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 5 - Magnetism>Problems For Practice>Q 7
A magnetised steel wire 31.4 cm long has a pole strength of 0.2 Am. It is bent in the form of a semicircle. Calculate the magnetic moment of the steel wire.
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 5 - Magnetism>Problems For Practice>Q 8
Two thin bar magnets of pole strengths m1=25 A m and m2=48 A m respectively and lengths 0.20 m and 0.25 m respectively are placed at right angles to each other with the N-pole of first touching the S-pole of the second. Find the magnetic moment of the system.
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 5 - Magnetism>Problems For Practice>Q 1
A bar magnet is 0.10 m long and its pole strength is 12 Am. Find the magnitude of the magnetic field at a point on its axis at a distance of 20 cm from it.