Question

three resistance of 15ohm , 20ohm, 10ohm are connected in series combination option answer​

Answer 1

Given:-

• Three resistance of 15 ohm , 20 ohm and 10 ohm are connected in series combination.

To Find:-

• Equivalent Resistance

Formula used:-

• R' = $R_1+R_2+R_3$

Solution:-

As Given,

• $R_1=15 \:ohm$
• $R_2= 20\:ohm$
• $R_3=10\:ohm$

Putting the value in the formula,

➠ R' = $R_1+R_2+R_3$

➠ R' = $(15+20+10)\:ohm$

➠ R' = $45\:ohm$

Hence, the Equivalent Resistance is 45 ohm.

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More To Know:-

• Series Combination:- When two or more resistors are connected end to end, then they are said to be connected in series.

• Parallel Combination:- When two or more register are connected simultaneously between two points, then they form a parallel combination.

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Answer 2

Total resistance in parallel is Rp

So (1/Rp) = (1/20)+(1/20)+(1/30)

=(1/10)+(1/30)=(4/30)=(2/15)

Hence Rp=15/2

Since total impedance is 10.

Hence 10 = Rp+RS

Where Rs is series resistance.

Rs= 10-(15/2) = 5/2 = 2.5ohm