Question

i need help look at this photo.

Answer 1

First you need to calculate the resistance of the 10 ohm resistor in parallel with the series combination of the 12 and 18 ohm resistors. Do you want help step by step?

Answer 2

@alfers101 Are you there?

Answer 3

yes im here @kropot72

Answer 4

yes please help my step by step @kropot72 im not good at this

Answer 5

The total value of the series combination of the 12 and 18 ohm resistors is;
12 + 18 = 30 ohms.
The resistance of the parallel combination of 10 ohms and 30 ohms is given by
\[R _{p}=\frac{10\times30}{10+30}=you\ can\ calculate\]

Answer 6

i got 7.5

Answer 7

what will happen to the 4 ?

Answer 8

We now know that the resistance between points a and b is 7.5 ohms. The current through the 4 ohm resistor is equal to the current into the 7.5 ohm combination of resistors. This current is given by
\[I=\frac{6}{7.5}\ amp\]
We can now find the voltage drop across the 4 ohm resistor which is
\[V _{r}= I \times R=\frac{6}{7.5}\times4=you\ can\ calculate.\]
Finally the voltage E is found from
\[E=6+V _{r}\]

Answer 9

why 6 ?

Answer 10

The volage between points a and b is shown to be 6 volts.

Answer 11

Vr=3.2

Answer 12

hats what i got

Answer 13

*thats

Answer 14

then i'll add 6 ?

Answer 15

Correct, you add 6.

Answer 16

why will i use 6 again ?

Answer 17

my E= 9.2

Answer 18

6 was used to find the current through the 4 ohm resistor. 6 must be added to the voltage across the 4 ohm resistor to find the value of E.
Your calculation of E is correct.

Answer 19

if i have this problem, i will use the same procedure?

Answer 20

but we gave you the answer @alfers101

Answer 21

in mathemathics

Answer 22

yes thank you @PFEH.1999 and @kropot72

Answer 23

No!
i'm saying that you sould not ask two same questions in two subjects!

Answer 24

The resistance of the series/parallel combination is
\[R _{p}=\frac{15\times30}{15+30}=10\ ohms\]
The voltage across the 10 ohm combination is given by
\[V=E \times\frac{10}{15}=\frac{2}{3}E\]
The voltage between b and c is given by
\[V _{bc}=\frac{2}{3}E \times\frac{18}{30}=0.4E\]
We are given that the voltage between a and b is 10 volts and we have found that the voltage between b and c is 0.4E. Therefore
E = 10 + 0.4E ..............(1)
Now you need to solve equation (1) to find the value of E.