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Q.

During measurement of kinetic energy T, the percentage error in measurement of mass of particle and momentum of particle are 2% and 3%, respectively. The percentage error in measurement of kinetic energy is n%. Find the value of n.

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answer is 8.

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Detailed Solution

∵T=p22m or ΔTT=2Δpp+ΔmmPercentage error in kinetic energy isΔTT×100=2Δpp×100+Δmm×100=2×3%+2%=8%∴n=8

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