State whether the following statements are True (T) or False (F) :
The velocity of gamma rays is more than that of x-rays.

State whether the following statements are True (T) or False (F) : The speed of light in glass is less than the speed of light in water.

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): Electric field is a scalar field.

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

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) The speed of red light is less than that for yellow light.

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): The charging equation of a cell is V= E + Ir.

State whether the following statements are True (T) or False (F) : Ozone layer prevents gamma-rays and x-rays to enter earths atmosphere.

State whether the following statements are True (T) or False (F): The power of a lens is 4D. The focal length is 50 cm.