State whether the following statements are True (T) or False (F):
The mass of a body decreases when it is positively charged.

State whether the following statements are True (T) or False (F): The mass of a body decreases when it is negatively charged.

State whether the following statements are True (T) or False (F): The charge of a body increases with increases in velocity of the body.

State whether the following statements are True (T) or False (F): The charge of a body may be 2 xx 10^19C .

State whether the following statements are True (T) or False (F): A cell is a source of electrons.

State whether the following statements are True (T) or False (F): The nature of the lens changes when it is immersed in a medium whose refractive index is more than the refractive index of the material of the lens.

State wheteher the following statements are True (T) or False (F): All insulators are dielectrics.

State whether the following statements are True (T) or False (F): Test charge is considered to be a small positive charge (+q).

State whether the following statements are True (T) or False (F): In Boolean algebra (A+A) = A.

State whether the following statements are True (T) or False (F): Electric field is a scalar field.

State whether the following statements are True (T) or False (F): The magnitude of Coulomb force between two point charges increases when the medium air is replaced by any diectric medium.