Two identical square rods of metal are welded end to end as shown in figure (i), 20 calories of heat flows through it in 4 minutes. If the rods are welded as shown in figure (ii), the same amount of heat will flow through the rods in

1 minute

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2 minutes

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4 minutes

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16 minutes

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Solution

The correct option is A
1 minute

time is proportationl to length and inversely proportational to area

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Two identical square rods of metal are welded end to end as shown in figure (i), 20 calories of heat flows through it in 4 minutes. If the rods are welded as shown in figure (ii), the same amount of heat will flow through the rods in

The correct option is A 1 minute time is proportationl to length and inversely proportational to area

The correct option is A
1 minute

time is proportationl to length and inversely proportational to area