MCQ
When a bimetallic strip is heated, it
- ADoes not bend at all
- BGets twisted in the form of an helix
- ✓Bend in the form of an arc with the more expandable metal outside
- DBends in the form of an arc with the more expandable metal inside

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Statement $1 :$ An inventor claims to have constructed an engine that has an efficiency of $30\%$ when operated between the boiling and freezing points of water. This is not possible.
Statement $2:$ The efficiency of a real engine is always less than the efficiency of a Carnot engine operating between the same two temperatures.
$(A)$ $\mu_0 I ^2=\varepsilon_0 V ^2$ $(B)$ $\varepsilon_0 I =\mu_0 V$ $(C)$ $I =\varepsilon_0 cV$ $(D)$ $\mu_0 cI =\varepsilon_0 V$
