Categories
Physics

Free electrons are

  • Tightly bound
  • fixed
  • Strongly fixed
  • Loosely bound
Categories
Physics

Two oppositely charged balls A & B attract third ball C when placed near them turn by turn. Then ball C must be

  • Positively charged
  • Electrically
    neutral
  • Negatively charged
  • Both (a) & (c)
Categories
Physics

Metals are good conductors of electricity because they have

  • Large number of
    bounded electrons
  • small number of
    bounded
    electrons
  • A large number of free
    electrons
  • small number of
    free electrons
Categories
Physics

The number of base units in SI are:

(A) Three

(B) Six

(C) Seven

D) Nine