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
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