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akramfaridi
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The resistances of commerciallyavailable discrete resistors are restricted to particular sets. For example, the available values of resistors with 10% tolerance are selections from the E12 set multiplied by a power of ten from 100 through 105. The E12 set is:
E12={10,12,15,18,22,27,33,39,47,56,68,82}
Thus, you can buy 10% resistors with a nominal resistance of 330Ω or 33kΩ, but not 350Ω. Furthermore, the "tolerance" means that if you buy a 10% 390Ω resistor you can be sure that its resistance is between 351Ω and 429Ω.
In this problem we need to choose 10% resistors to make a current divi
 11 months ago
 11 months ago
akramfaridi Group Title
The resistances of commerciallyavailable discrete resistors are restricted to particular sets. For example, the available values of resistors with 10% tolerance are selections from the E12 set multiplied by a power of ten from 100 through 105. The E12 set is: E12={10,12,15,18,22,27,33,39,47,56,68,82} Thus, you can buy 10% resistors with a nominal resistance of 330Ω or 33kΩ, but not 350Ω. Furthermore, the "tolerance" means that if you buy a 10% 390Ω resistor you can be sure that its resistance is between 351Ω and 429Ω. In this problem we need to choose 10% resistors to make a current divi
 11 months ago
 11 months ago

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akramfaridi Group TitleBest ResponseYou've already chosen the best response.0
i am still not getting it...i am confused
 11 months ago

KenLJW Group TitleBest ResponseYou've already chosen the best response.0
general resistors a R(1+x) x is the tolerance The ones mentioned come with x = .05, .1, .2 There are others available with x = .01, generally metal film, some come standard and some not There's all available x = .001 but have less standard range Aside from resistor tolerance there is also associated temperature coefficient. To find these and other available there's a number a electronic catalogs either through mail or online, one source is DigtKey
 11 months ago
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