Concept explainers
a. Can gravity be shielded?
b. Can electric fields be shielded?
(a)
To explain: The gravity field can be shielded
Explanation of Solution
No, gravitational fields cannot be shielded. If one bring a object with mass to cover up the field or making a wall to reduce its gravitational field effect, this would increase the gravitational even more. Because the gravitational field by the other object add up the existing gravitational field in that region.
(b)
To explain: The electric field can be shielded
Explanation of Solution
Yes, electric fields can be shielded. Because the net electric field inside it is zero, so if you place a charged object inside a hollow conductor, it will not be attracted or repel by the outer electric field. The outer field can’t expect any force on the charged object inside a hollow conductor.
Chapter 33 Solutions
Conceptual Physics: The High School Physics Program
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