What Does the 10% Resistance Boundary Mean in Circuit Measurements?

[Daniel2244]

Homework Statement

if someone could help me with this it would be much appreciated. In physics, I used a 98Ω resistor in a series circuit and measured the current and voltage output from battery, using the current and voltage I calculated the resistance. I=0.0094A V=1 Rt=1/0.0094=106.38Ω even though it exceeded the RT 98 it's still in the 10% boundary.

Homework Equations

RT=R1+R2+...RN

The Attempt at a Solution

I don't understand what the 10% boundary means. Is it the error% of the resistor? so anything in the 10% boundary is correct but anything below/above is incorrect and there is something wrong with the circuit? for example, faults wires faulty DDM(digital multi-meter)

 

[phinds]

Resistance tolerances mean exactly what they say. 10% means that the value can vary by 10% (up or down)

 

[Daniel2244]

Resistance tolerances mean exactly what they say. 10% means that the value can vary by 10% (up or down)

Thanks for clearing it up for me :)

 

[CWatters]

You can buy resistors with various tolerance bands such as 10%, 5%, 2%,1% etc. The tighter the tolerance the more preferred values there are (can be) in the range without overlaps.

 

[Daniel2244]

You can buy resistors with various tolerance bands such as 10%, 5%, 2%,1% etc. The tighter the tolerance the more preferred values there are (can be) in the range without overlaps.

So would I ±10% for the value of a resistors stated by the manufacturer (200Ω) or by the resistance I measured (197Ω) using a ohmmeter?

 

[gneill]

So would I ±10% for the value of a resistors stated by the manufacturer (200Ω) or by the resistance I measured (197Ω) using a ohmmeter?

The resistor manufacturer guarantees their components to be within the stated tolerance.

The value that you read using a meter will tell you the actual value for your resistor to within the accuracy of your meter (Meters aren't perfect, either!).

 

[Daniel2244]

The resistor manufacturer guarantees their components to be within the stated tolerance.

The value that you read using a meter will tell you the actual value for your resistor to within the accuracy of your meter (Meters aren't perfect, either!).

Ok, thanks