A brass rod of length $1 m$ is fixed to a vertical wall at one end, with the other end keeping free to expand. When the temperature of the rod is increased by $120^{\circ} C$ , the length increases by $3 c m$ . What is the strain?

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Solution

The correct option is A $0$
$△ L = α △ T$
Strain $= \frac{△ L}{L} = \frac{0.03 m}{1 m} \approx 0$

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A brass rod of length 1 m is fixed to a vertical wall at one end, with the other end keeping free to expand. When the temperature of the rod is increased by 120∘C , the length increases by 3 cm. What is the strain?

The correct option is A 0△L=α△TStrain=△LL=0.03m1m≈0

A brass rod of length $1 m$ is fixed to a vertical wall at one end, with the other end keeping free to expand. When the temperature of the rod is increased by $120^{\circ} C$ , the length increases by $3 c m$ . What is the strain?

The correct option is A $0$
$△ L = α △ T$
Strain $= \frac{△ L}{L} = \frac{0.03 m}{1 m} \approx 0$