State whether the following statements are True (T) or False (F):
From a NOR gate only NOT gate can be obtained.

State whether the following statements are True (T) or False (F): From a NAND gate one can get OR, AND and NOT gates

State whether the following statements are True (T) or False (F): An AND gate followed by a NOT gate gives rise to a NAND gate.

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): In a NAND gate both the inputs have to be low so that the output has to be low.

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): Charges can be created but can not be destroyed.

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 focal length of the new combined lens of f1 and f2 each are f is 2f.

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 mass of a body decreases when it is negatively charged.