Question

Possible Ohm's Law Errors?

Answer 1

We did a lab using Ohm's Law to find the current by using the resistors in parallel and series circuits. We measured the voltage and current. My teacher said we were supposed to get lower than 10% error and I got 11% error. Anyone have any ideas of possible errors?

Answer 2

i already have down:
incorrect reading on ammeter and voltmeter
for possible errors.
any other suggestions?

Answer 3

what measurements did you take,
how did you calculate your error?

Answer 4

the error in current.
We were given that we had a 3V battery and 3 10 ohm resistors,
so i found the current using V= IR
the resistance is 30 ohms in series and 3.333... ohms in parallel
we were supposed to find the error for the current and the actual current was 0.11 A in series and 1 A in parallel.

Answer 5

i calculated my error
(actual - exp.)/ actual x 100 for both.
and i got 9.1 for series and 10 for parallel. i asked my teacher and she said that something may have gone wrong because she said we were supposed to get like minimal error. i just need possible cases for errors. i already said that there may have been the ammeter or voltmeter mistake.

Answer 6

how did you get 0.11A?

Answer 7

oh, that was what we measured from the ammeter.

Answer 8

i got 0.1 A for the series current

Answer 9

the ammeter would have some resistance

Answer 10

oh okay thanks.

Answer 11

would the voltmeter have resistance as well?

Answer 12

yes, probably much more then the ammeter