Question

if two wires having resistance (20ohm+-2%) and r2 is( 10 ohm+-1% ) if these wire are connected in series then find the equivalent resistance​

Answer 1

Explanation:

we know

R = R1 + R2

So, R = 20 + 10 = 30ohm

For maximum error limit -->

We know for the condition

Z = A + B

maximum error of Z (∆z) is

∆z = ∆a + ∆b

∆z = 2 + 1 = 3

so answer is => 30+-3

hope this helps you