Subject :NSO Class : Class 7
Aparna heated a bi-metallic strip made of two different types of metals for some time.
After heating it, she observed that the metallic strip curved as shown in the figure.
Which of the following would best explain the conclusion derived by Aparna about the experiment she had done?
AMetal X is a better conductor of heat than metal Y.
BMetal X is a poorer conductor of heat than metal Y.
CMetal X is of better quality than metal Y.
DMetal X is more flexible than metal Y.