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ISC Class XI Physics – Physical World & Dimensional Analysis
Statement: A physical relation is mathematically correct only if the dimensions of all the terms on both sides of the equation are identical.
T = 2π √(l/g).LHS: Dimension of Time
T = [M⁰L⁰T¹].RHS:
√(L / [LT⁻²]) = √(T²) = [T¹].Conclusion: Since dimensions of LHS = RHS, the relation is dimensionally correct. (Award: 3 Marks)
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