- #1
Amith2006
- 427
- 2
1)A sensitive magnetic instrument can be shielded very effectively from outside fields by placing it inside a box of :
a)teak wood
b)plastic material
c)soft iron of high permeability
d)a metal of high of conductivity
The electric lines of force cannot penetrate a closed metal box. But I don’t know about magnetic lines of forces. Can someone clear my doubt? The answer would be either {c} or (d).
a)teak wood
b)plastic material
c)soft iron of high permeability
d)a metal of high of conductivity
The electric lines of force cannot penetrate a closed metal box. But I don’t know about magnetic lines of forces. Can someone clear my doubt? The answer would be either {c} or (d).