Q. Bimetallic strips work on the principle of __________.

द्विधात्विक पट्टियाँ __________ के सिद्धांत पर काम करती हैं।

A
Electrical resistance
विद्युत प्रतिरोध
B
Magnetic field
चुंबकीय क्षेत्र
C
Thermal expansion
थर्मल विस्तार
D
Chemical bonding
रासायनिक बंधन

Explanation

Bimetallic strips consist of two different metals bonded together. When heated, each metal expands at a different rate due to differing coefficients of thermal expansion. This mismatch causes the strip to bend, which is used in devices like thermostats. This bending effect directly relies on the principle of thermal expansion.

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