Question

A piece of paper wrapped tightly on a wooden rod is found to get charged quickly when held over a flame compared to similar piece when wrapped on a brass rod. This is because :

• A. brass is good conductor and wood is a bad conductor of heat
• B. brass contains large number of free electrons
  
• C. wood contains large number of free electrons
• D. wood is good conductor and brass is a bad conductor of heat
  

Answer 1

The correct option is A brass is good conductor and wood is a bad conductor of heat

Wood is a poor conductor of heat while brass is a good conductor of heat as brass is made of copper and zinc (both are metals). So it conducts heat very fast.