Second Order Circuit

Find i(t)?

Equivalent resistance problem 4

Problem 4:

Find $R_{ab}$?

Answer: $5\Omega$  

Equivalent resistance problem 3

Problem 3:

Find $R_{ab}$?

Answer: $R$

Equivalent resistance problem 2

Problem 2:

Find $R_{ab}$?

Answer: $\frac{R}{3}$

Equivalent resistance problem 1

Problem 1:

Find $R_{ab}$?

Answer: $4\Omega $ 

Star-Delta transformation

Find $R_a$?

Solution:

                $R_a=R_1+R_2+\frac{R_1R_2}{R_3}$

• If $R_1=R_2=R_3=R_Y$ then find $R_{\Delta }$?

      Solution: $R_{\Delta }=3R_Y$

Series and Parallel circuits practice exercise

Problem 1:

Find $R_{ab}$=?

        $R_{cd}$=?

        $R_{ac}$=?

Solution: $R_{ab}=\left(R_1+R_3\right)=R_{ad}$

               $R_{cd}=\left(R_1+R_3\right)=R_{cb}$

               $R_{ac}=\left(R_1+R_2\right)$