0. If a neutral body becomes positi

0. If a neutral body becomes positively charged electrically, we know that  it has:

      (A) gained electrons                        (C) gained protons    

      (B) lost electrons                            (D) lost protons

31. The nucleus of an atom:

      (A) always has a positive electric charge

      (B) is electrically neutral

      (C) always has a negative charge

      (D) may be either positively or negatively charged or neutral
 When a rubber rod is rubbed with fur, the rubber rod acquires a positive charge:

    (A) true

    (B) false
28. When a bakelite rod is rubbed with fur, the fur acquires a positive charge:

     (A) true

     (B) false