If a body is charged by rubbing, then its weight:

• (A) Remains precisely constant
• (B) Increases slightly
• (C) Decreases slightly
• (D) May increase or decrease slightly

When a body is charged by rubbing, it typically involves the transfer of electrons, which can lead to a change in the distribution of charge on the surface of the object. However, this process does not significantly alter the mass of the object itself.

Understanding Weight Changes

Weight is the force exerted by gravity on an object, which depends on its mass. Since rubbing does not add or remove mass, the weight remains largely unchanged.

Options Explained

• Remains precisely constant: This is the most accurate choice, as the mass does not change.
• Increases slightly: This is incorrect; charging does not add mass.
• Decreases slightly: This is also incorrect for the same reason.
• May increase or decrease slightly: This option is misleading since the mass remains constant.

Therefore, the correct answer is (A) Remains precisely constant.