What type of charges are obtained on silk cloth and glass rod ?

Give difference between charge and mass.

A proton and a deuteron are initially at rest and are accelerated through the same potential difference. Which of the following is false concerning the final properties of the two particles ?

How conductors and non-conductors are different ? Why are they not charged by rubbing them with our hands ?

Two objects are rubbed against each other, the nature of electric force, when they are placed at some distance is

Sure check for presence of electric charge is