Question

If voltage , V = 100 + 6 volt and current , I = 10+ 0.2 A , then find percentage error in R.

Answer 1

Explanation:

As we know, resistance is the ratio of voltage used and current flowing through the circuit. So,

R = V/I

By error calculation

∆R/R = [(∆V/V)100] + [(∆I/I)100]

V = 100 ± 6% V

I = 10 ± 0.2% A

∆R/R= (5/100)×100 + (0.2/10)×100

∆R/R=5+2=7%

So, percentage error in resistance (R) = ± 7%.