A thermometer has fixed points 150 mm apart. Its mercury thread rises 30 mm above lower fixed point. The reading is n×10°C. Find n.
Physics · Mixed Chapter
JEE Main Practice

Question

A thermometer has fixed points 150 mm apart. Its mercury thread rises 30 mm above lower fixed point. The reading is n×10°C. Find n.

G1 Physics · Accepted Answer

Step 1: Distance between fixed points corresponds to 100°C. Step 2: θ=(30/150)×100=20°C. Step 3: Since θ=n×10°C, n=20/10=2.