Two resistors \( R \) and \( 2 R \) are connected in series in an electric circuit. The thermal ...

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Two resistors \( R \) and \( 2 R \) are connected in series in an electric circuit. The thermal energy developed in \( R \) and \( 2 R \) are in the ratio
(a) \( 1: 2 \)
(b) \( 2: 1 \)
(c) \( 1: 4 \)
(d) \( 4: 1 \).
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