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If momentum (P), area (A) and time (T) are taken to be the fundamental quantities then the dimensional formula for energy is :

1. [PA – 1 T – 2 ]
2. [PA 1/2 T – 1 ]
3. [P 2 AT – 2 ]
4. [P 1/2 AT – 1 ]

Correct answer: [PA 1/2 T – 1 ]

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