Question

A metallic ball and highly stretched spring are made of the same material and have the same mass. They are heated so that they melt, the latent heat required_____

• A. for the two may or may not be the same depending upon the metal.
  
• B. is greater for the spring.
  
• C. is greater for the ball.
  
• D. are the same for both.
  

Answer 1

The correct option is D are the same for both.


Amount of heat required to change state of body is given by $Q=mL$.
Where $m$ is mass of body and $L$ is latent heat and since both are same for ball and spring as composition of bodies is same, latent heat required will be same.
FINAL ANSWER: (a)