The following table gives the resistivity of three samples:

Asked by Gurleen Kaur | 18th Jun, 2011, 08:56: PM

Expert Answer:

As we know that 
 
where H is heat ,I is the current ,R is the resistance and t is the time.
and from the equation we know that heat is directly proportional to resistance .
Therefore sample C will be suitable for heating elements of electrical appliances as sample C has high Resistivity in comparision with other two sample.

Answered by  | 19th Jun, 2011, 02:14: AM

Queries asked on Sunday & after 7pm from Monday to Saturday will be answered after 12pm the next working day.