physics question
posted by ong .
A resistance box has the following components and tolerances:
10 resistors each of 100k§Ù ¡¾ 0.05%
10 resistors each of 10k§Ù ¡¾ 0.05%
10 resistors each of 1k§Ù ¡¾ 0.05%
10 resistors each of 100§Ù ¡¾ 0.1%
10 resistors each of 10§Ù ¡¾ 0.5%
Determine both in ohms and percentage the limit of uncertainty in setting of 453.72k§Ù

first, calculate the additive errors.
4x100k error is 400Kx.0005=200
5x10k error is 50kx.0005=25
3x1k error is 3kx.0005=1.5ohm
7x100 error is 700x.001=.7
2x10 error is 20x.005=.1 ohm
error^2=200^2+25^2+1.5^2+.7^2 +.1^2
do the math, that is the error in ohms. Then figure percent.
limit of uncertainity is harder. Notice your percents are to one significant figure, so 200 in the first one can range from 150 to 250. all the others are withing that error, so you have +250 ohm. Your instructor may have given you other instructions on this. If the percent error was to be considered absolute, then add the errors.
Respond to this Question
Similar Questions

physics (please help)
Four 20 ohm resistors are connected in parallel and the combination is connected to a 20 V emf device. The current in any one of the resistors is: A) 0.25 A B) 1.0 A C) 4.0 A D) 5.0 A E) 100 A I get B V=IR I= 20V/20 ohms = 1 A for … 
Physics
You have two identical resistors 50kohm each and a 1.5V battery. Which of the following statements are true a)the current drawn is bigger if the resistors are in series b) the current drawn is bigger if the resistors are in parallel … 
Physics
When a pair of identical resistors is connected in series which of the following is the same for both resistors: voltage across each, power dissipated in each, current through each? 
physics
If three identical resistors are connected in series to a battery, the resistance of the combination will be ___ times the resistance of any one of the resistors. 
Probability and Statistics
A package contains 12 resistors, 3 of which are defective. If four are selected, find the probability of getting the following. No defective resistors One defective resistors 3 defective resistors 
Probability and Statistics
A package contains 12 resistors, 3 of which are defective. If four are selected, find the probability of getting the following. No defective resistors One defective resistors 3 defective resistors 
Physics (URGENT)
Three wirewound resistors have the following values: 30 ohms, 80 ohms, and 100 ohms. Each resistor has a voltage rating of 100V. If these three resistors are connected in series, can they be connected to a 240V circuit without damage … 
Physics
A certain number of identical resistors are connected in series and their total resistance is measured. When the resistors are disconnected and reconnected in parallel, their total resistance drops to onepercent of the value measured … 
Physics
You are given five identical resistors each of resistance r. How can you arrange all these resistors (in series, in parallel, or both) in order to have an equivalent resistance of 7r/2, 7r/3 or 2r 
Physics
Let n represent the number of similar resistors in a circuit. Each resistor has a resistance of r. When the resistors are connected in parallel the circuit has a total resistance of R. What would the total resistance of the circuit …