Question

V (50+-2)V,I(5+-0.1)A if resistance R=V/I then find the percentage error in R.

Answer 1

Given : V = (50 +- 2) V and I = (5 +- 0.1) A

To find : Percentage error in R

Solution :

• According to ohm's law, the current through a conductor between two points is directly prthe oportional to the voltage across the two points.

V = IR

• R = V/I

(∆R/R)×100 = (∆V/V)×100 - (∆I/I)×100

= 2 - 0.1

• (∆R/R)×100 = 1.9

Hence, percentage error in R is 1.9