Subject :NSO Class : Class 6
Which of the following is incorrect?
A To increase the magnetic strength, increase the number of strokes while creating magnets.
B To increase the magnetic strength, increase the number of coils around the nail.
C Magnetic force is a pulling force only.
D Magnet may lose its magnetic property when heated to a very high temperature.
all option are correct ,no option is incorrect so they should give one incorrect option.
Ans 1:
Class : Class 6
c is the answer
Ans 2:
Class : Class 10
pulling force means attracting force
Ans 3:
Class : Class 6
(C) should be the ans as .IF the like pole meets each other than they will repel each other