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Physics - Practical physics Question with Solution | TestHub

PhysicsPractical physicsMiscellaneousEasy2 minPYQ_2020

PhysicsEasysingle choice

There is an unknown quantity $x = R \frac{l}{100 - l}$ , here $l$ is length $($ in $cm$ $)$ measured using a scale having least count of $1 cm$ . and $R$ is a quantity known accurately. Find the percentage error in measurement of $x$ for $l = 50 cm$ ?

Options:

Answer:

Solution:

$x = R \frac{ℓ}{100 - ℓ}$

$\frac{Δ x}{x} = \frac{Δ ℓ}{ℓ} + \frac{Δ ℓ}{100 - ℓ}$

$\frac{Δ x}{x} \times 100 = (\frac{1}{50} + \frac{1}{50}) \times 100 = 4 %$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:Practical physicsSubtopic:Miscellaneous

⏱ 2mℹ️ Source: PYQ_2020

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