Two waves will be in phase and will produce constructive interference any time their path-length difference is aNo _____________
1 answer:
You might be interested in
Explanation:
the missing figure in the Question has been put in the attachment.
Then from the figure we can observe that
the center of the sphere is positive, therefore, negative charge will be induced at A.
As B is grounded there will not be any charge on B
Hence the answer is A is negative and B is charge less.
