# Calculation of errors in resistance

#### Naja naja

##### JF-Expert Member
Given R1=40 with tolerance of 3% and R2=30 with tolerance of 9% find total resistance

a) in series
b) in parallel

#### Emiir

##### JF-Expert Member
a) 73.8 or 66.1
b) 0.0548 or 0.0624

Nasubiri majibu

#### Bujibuji

##### JF-Expert Member
Correction of errors

Napita hapo

#### Emiir

##### JF-Expert Member
Sheria ya kutafuta resistance zikiwa series unajumlisha [R1+R2+.......Rⁿ]

Sheria ya kutafuta resistance zikiwa parallel = R1+R2 Misha unagawanya kwa R1xR2

Mmmh

#### lwiva

##### JF-Expert Member
Hapo unatakiwa ujue dhana ya tolerance utapata jibu hesabu ndogo sana hiyo

#### duyudu

##### Member
In series Rs=(R1+R2)+(∆R1+∆R2)
=(40+30)+(0.03+0.09)
=(70+/-0.12)ohm

#### duyudu

##### Member
Given R1=40 with tolerance of 3% and R2=30 with tolerance of 9% find total resistance

a) in series
b) in parallel

In series Rs=(R1+R2)+(∆R1+∆R2)
=(40+30)+(0.03+0.09)
=(70+/-0.12)ohm
In parallel
Apply natural logarithm to the equation ln Rp=ln(R1R2/Rs)
ln Rp=lnR1+lnR2-lnRs
Differentiate
∆Rp/Rp=∆R1/R1+..........kama hujaelewa nitafute mi nimechoka Ku type

#### four eyes

##### JF-Expert Member
Hizi ni hesabu za kujua ktk makinikia Kuna dhahabu kiasi gani?

#### Naja naja

##### JF-Expert Member
In parallel
Apply natural logarithm to the equation ln Rp=ln(R1R2/Rs)
ln Rp=lnR1+lnR2-lnRs
Differentiate
∆Rp/Rp=∆R1/R1+..........kama hujaelewa nitafute mi nimechoka Ku type
Sijaelewa hiyo RS ndo nini?

#### Dragoon

##### JF-Expert Member
Nyie fanyeni mahesabu, baadae mtaniletea vyombo vyenu niwatengenezee. Mimi ndio kiboko ya mambo ya resistor katika practice. Naangalia rangi ya michoro yake tu nishajua nguvu yake.

Rs=R1+R2

#### simplemind

##### JF-Expert Member
The tighter the tolerance the more stringent is the manufacturing process as regards material selection, production method , quality control. Tanzania ya viwanda inawezekana.

### Toa taarifa ya maudhui yasiyofaa!

Kuna taarifa umeiona humu JamiiForums na haifai kubaki mtandaoni?

### Umesahau Password au akaunti yako?

Unapata ugumu kuikumbuka akaunti yako? Unakwama kuanzisha akaunti?