Question

A combined circuit has two resistors in parallel (10.0 ohms and 14.0 ohms) and another in series (5.0 ohms). If the power source is 9.0 volts, what is the current?

A. 1.6 amps
B. 5.8 amps
C. 0.83 amps
D. 1.3 amps

Answer 1

When there are various resistors in a circuit, you should always find a single equivalent resistor's resistance, in the following way:
a) If the resistors are in parallel, find the equivalent resistance using:
\[Req=(R1\times R2)/(R1+R2)\]
Here R1=10 and R2=14
Find the equivalent resistance/
b) You'll see that the equivalent resistance of a) is in series with the 5 ohm resistor. So, you just add the equivalent resistance of a) with 5 to get the equivalent resistance of the whole circuit.
Now, use \[V=IR\] where R is the equivalent resistance

Answer 2

thank you it was wright :)

Answer 3

im so confused please help me understand this