A. square steel ring
B. triangular zinc ring
C. soft iron ring
D. loop of copper wire

Correct Answer:

Option C – soft iron ring

Explanation

In order to protect material from the influence of an external magnetic field, the material is placed in a soft iron ring, usually referred to as magnetic screening.

SEE ALSO  The resultant of two forces 12N and 5N is 13N. What is the angle between the two forces?

Copyright warnings! Do not copy.