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A circuit is made as shown --- The circuit contains a component made of bimetallic strip . If the temperature is increased , will the bulb glow ? ( Assume the emf of battery is enough to light the bulb )


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Answer : No
Since the coefficient of linear expansion of lower strips more , it expands more than the upper rod .
Since the strips are joined , so the radius of curvature must increase . Therefore , the bimetallic strip will never touch the metallic piece such that the bulb grows .
answered Mar 15, 2014 by yamini.v

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