Physics And Measurement Question 299

Question: The resistance R of a wire is given by the relation R=ρπr2 . Percentage error in the measurement of ρ, and r is 1%, 2% and 3% respectively. Then the percentage error in the measurement of R is

Options:

A) 6

B) 9

C) 8

D) 10

Show Answer

Answer:

Correct Answer: B

Solution:

[b] Given R=ρπr2 ,then ΔRR×100

=Δρρ×100+Δ×100+2Δrr×100

=1



NCERT Chapter Video Solution

Dual Pane