When a biro pen rubbed on a dry silk cloth is moved very close to a piece of paper on a dry table, the pen is found to pick up the paper. This is because
-
A.
both the pen and the cloth are magnetized -
B.
the pen is magnetized but the cloth is not -
C.
the pen is charged while the cloth is magnetized -
D.
both the pen and the cloth are charged
Correct Answer: Option D
Explanation
They are all charged either positively or negatively