Physics for IGCSE & O level - Thermal Effects (Section 4 - No. 8)
In a bimetallic strip, how is a change in temperature indicated?
By a change in color
By a change in density
By the strip bending
By a change in mass
ব্যাখ্যা
A bimetallic strip bends because the two metals expand or contract at different rates with temperature changes.