Question

If there are $5$ minor divisions between two major divisions, one major division representing $1^{\circ }C$, one minor division will be equal to:

• A. ${0.5}^{o}C$
• B. $1/5^{o}C$
• C. ${0.2}^{o}C$
• D. ${0.1}^{o}C$

Answer 1

Answer: (B), (C)

${0.2}^{o}C$

One major division equals $5$ minor division.
$\therefore \text{1 minor division}$ $=\frac{1}{5}\text{major division}$
$\therefore \text{1 minor division}$ $=\frac{1}{5}\left(1^{\circ }\text{C}\right)$
$\text{So,}\text{1 minor division}$ $={0.2}^{\circ }\text{C}$
This is called the least count of thermometer.