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Standard VII
Physics
Question

A student took an iron rod and a wooden rod and wrapped each of them in a piece of paper. These were then heated as shown. It was found that the paper around the iron rod does not burn whereas the one around the wooden rod catches fire.It is because
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  1. Candle, in case of iron rod, is nearer to the paper
  2. Wood being a bad conductor of heat, takes away all the heat
  3. Iron being a good conductor of heat, conducts away the heat give to the paper
  4. Paper, in first case, is thicker

A
Candle, in case of iron rod, is nearer to the paper
B
Wood being a bad conductor of heat, takes away all the heat
C
Iron being a good conductor of heat, conducts away the heat give to the paper
D
Paper, in first case, is thicker
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A student took an iron rod and a wooden rod and wrapped each of them in a piece of paper. These were then heated as shown. It was found that the paper around the iron rod does not burn whereas the one around the wooden rod catches fire.It is because
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