Question

A spherical body P has a positive charge on it. It attracts another sphere Q placed near it. The sphere Q is
$A.$ Negatively charge
$B.$ Positively charge
$C.$ Neutral
$D.$ May be negative or neutral

Answer 1

- Hint: When one object is rubbed against another, electricity is often created. This is because the rubbing creates a charge that's carried by electrons. The electrons can build up to supply electricity . For example, once you shuffle your feet across a carpet, you're creating many surface contacts between your feet and therefore the carpet, allowing electrons to transfer to you, thereby building up a static charge on your skin. When you touch another person or an object, you'll suddenly discharge the static as an electric shock.

Complete step-by-step answer:
Using this concept in our question we get,
The process of charging an uncharged body by rubbing it with another suitable body is named electrification by friction.
Therefore, when a body P of positive charge is rubbed against a body Q, the two bodies will attract if the body Q is negatively charged. Also, when a body P of positive charge is rubbed with an uncharged body Q, the body Q acquires a charge opposite to the charge of body P. That is, negative and they attract each other as unlike charges attract.
Hence, a spherical body P having a charge thereon attracts another sphere Q placed near it as long as the sphere Q is charged or neutral.
Therefore, the correct option for the above question is option D.

Note: Charging by friction
By using the method of friction, positive charge is developed on one of the bodies and negative charge on the other. When these two bodies are brought close, they attract.
Some objects have a tendency to gain positive charge (examples glass and ebonite rod) while some objects have a tendency to gain negative charge (example silk).