BBA or B.COM | Which one is Better ?

Which of the following is a better reflector of heat and which one is a better absorber of heat ? (a) Shiny white surface (b) Dull black surface

Name the types of semiconductors produced when germanium (Ge) is doped separately with boron (B) and arsenic (As). Which one will be a better semiconductor and why ?

(a) Which is more conducting : silver or gold ? (b) Which is a better insulator : glass or ebonite ?

WHAT IS COM ?

(a) Which is a better fuel : coke or coal ? (b) Which fuel has the largest calorific value ?

COM Of Various Objects