Homework Help: Math/Physics

Posted by charlie on Monday, February 23, 2009 at 11:30am.

In a 9V circuit, all the resistors are 20 or 40 kilo Ohms.

Convention says that calcs should therefore be quoted to 1 sig fig, since the volts are the least accuracy.

2 seems better though. Any ideas?

Math/Physics - drwls, Monday, February 23, 2009 at 12:21pm
Carrying an extra sig. fig. is always a good idea, since the first significant digit of whatever you are computing (such as current in this case) may be a low one like 1 or 2.

1 +/- 0.5 is precision, but 9 +/- 0.5 is 0.55% precision.

Answer this Question

Related Questions

Sig Figs - In a 9V circuit, all the resistors are 20 or 40 kilo Ohms. Convention...
Physics, Thinking check please - A 9v circuit charges a capacitor to steady ...
Physics - Thanks for any help :) Four 20 ohm resistors are connected in parallel...
Physics - I'm totally confused and this is due Monday- We're dealing ...
physics - Four 20 ohm resistors are connected in series and the combination is ...
physics - Please check my work here: Resistors of 30 ohms and 60 ohms are ...
Physics - Circuits - Theres a circuit wired in series that has 4 resistors. 1) ...
College Physics - Two 9.1 ohms resistors are connected in parallel, as are two 5...
Science - There Are Three Resistance In A Parallel Circuit. Two Of Them Are ...
physics - A 15.0 Ohms resistor is connected in series to a 120V generator and ...

For Further Reading

First Name:
School Subject:
Answer: