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प्रश्न
In arrangements, A and B shown in Figure 4.7, pins P and Q are fixed to a metal loop and an iron rod with the help of wax. In which case are both the pins likely to fall at different times? Explain.
उत्तर
In the case of B, pin P will fall before pin Q because the heat will reach pin P first. In the case of A, the heat travels in both directions and pins P and Q will fall simultaneously.
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