sersol1

Solutions - and more questions!

Problem #1

To find total RESISTANCE (Rt) in a series circuit - you simply ADD the resistances.

Rt = R1+R2+R3

Rt = 9 ohms + 3 ohms + 12 ohms = 24 ohms

Note:

will flow in the circuit. Electrons flow from the Negative

(short line) side of the battery, to the Positive (long line) side

of the battery.

that it is not confused with a zero (0).

To find current flow in the circuit, Ohm's Law is used:

It = Et/Rt

It = 12 volts/ 24 ohms = 0.5 amps

Problem #2

To find Rt in the circuit:

Rt = R1+R2

Rt = 6 ohms + 6 ohms = 12 ohms

To find It in the circuit:

It = Et/Rt

It = 12 volts/ 12 ohms = 1 amp

Problem #3

To find Rt in the circuit:

Rt = R1+R2+R3+R4

Rt = 3 ohms + 2 ohms + 6 ohms + 1 ohm = 12 ohms

To find It in the circuit:

It = Et/Rt

It = 12 volts/ 12 ohms = 1 amp

Problem #4

You have to find Rt first:

Rt = R1+R2+R3

Rt = 3 ohms + 1 ohm + 2 ohms = 6 ohms

You have to then find It using Ohm's Law:

It = Et/Rt

It = 12 volts/ 6 ohms = 2 amps

But we know that there is only one path for current flow - therefore the
current flow is the same at any point in the circuit:

It=I1=I2=I3....

A1=A2=A3=A4= 2 amps

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