A bimetallic strip is made of aluminium and steel (α_Al > α_steel ) . On heating, the strip will

(a) Remain straight

(b) Get twisted

(c) Will bend with aluminium on concave side

(d) Will bend with steel on concave side

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Answered by

Payal Gupta | Contributor-Level 10

8 months ago

This is a multiple choice answer as classified in NCERT Exemplar

(d) As $α_{A l} > α_{s t e e l}$ , aluminium will expand more . so it would have larger radius of curvature. So aluminium will expand and will outside region.

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According to question, we can write

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Payal Gupta

This is a multiple choice answer as classified in NCERT Exemplar

(b), (c), (d) When the hot milk in the table is transferred to the surroundings by conduction, convection and radiation.

According to newton's law of cooling temperature of the milk falls of exponentially. Heat also will be transferred

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A bimetallic strip is made of aluminium and steel (αAl > αsteel ) . On heating, the strip will (a) Remain straight (b) Get twisted (c) Will bend with aluminium on concave side (d) Will bend with steel on concave side