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The net effective resistance of 5 ohms, 10 ohms, and 20 ohms in series is 35 ohms.

The current through the net effective resistance is [ I = E/R ] = 120/35 = 3.429 Amp. (rounded)

Note: If you try this at home, be aware that these resistors will dissipate

the 5 ohm . . . 58.8 watts

the 10 ohm . . . 117.6 watts

the 20 ohm . . . 235 watts .

These are no ordinary resistors, such as hang on the wall in plastic bags at Radio Shack.

These would have to be 'power' resistors ... like heating coils in a toaster or hair-dryer.

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Is there more resistance in the series circuit or the parallel circuit?

Ohm's Law says! R=V/I Resistance is directly proportional to Voltage. In series circuit, due to adding the resistance, total voltage will be increased, due to increasing of total voltage, total resistance of the series also be increased.


If one branch of a parallel circuit has high resistance?

If one branch of a parallel circuit has high resistance, it will draw less current compared to branches with lower resistance. This means that most of the total current will flow through the lower-resistance branches. Consequently, the voltage across all branches remains the same, but the overall current provided by the power source will be affected, potentially resulting in decreased total current in the circuit.


What is the total ampere draw of a parallel circuit the ampere readings of 2 amperes 7 amperes and 12 amperes?

In a parallel circuit, the total ampere draw is the sum of the individual currents. Therefore, if the readings are 2 amperes, 7 amperes, and 12 amperes, you add them together: 2 + 7 + 12 = 21 amperes. Thus, the total ampere draw of the circuit is 21 amperes.


There are three sources of resistance in a parallel circuit Two of them are rated at 20 ohms the other at 10 ohms What is the circuit's total resistance?

Well, honey, in a parallel circuit, you can't just add up the resistances like you're at a buffet. You gotta use the formula 1/Rtotal = 1/R1 + 1/R2 + 1/R3. Plug in the values and you'll find the total resistance is 6.67 ohms. So, grab your calculator and get to work, darling.


Is the total resistance of all the parallel loads more than the smallest individual resistance?

No. Perhaps an analogy would help understand the answer to this question. When you are at the store, and you are in a line waiting to be paid, opening up another line or more should increase how fast people can move through the store. That is a parallel operation. (If you have to go through one line at the store and then go through another line at the store, that is a series operation). Similarly, when a current meets a resistance, putting additional resistance in PARALLEL allows some of the current to divert to this new path or paths, allowing more current to flow through the combination of resistances. Since more current is flowing though the combined resistances, the equivalent resistance is less since less resistance always means more flow.

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