An insulated rod when rubbed with a material acquires
A
a negative charge if it is made of glass and rubbed with silk
B
no charge if it is made of glass and rubbed with fur
C
no charge if it is made of copper and rubbed with silk
D
a positive charge if it is made of copper and rubbed with fur
Verified Correct Answer: C.
Physical Principles & Numerical Solution
An insulated rod, when rubbed with a material, acquires no charge if it is made of copper and rubbed with silk.
Source: Myschool Past Questions Archive (Record #28196)