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A circuit contains two devices that are connected in parallelIf the resistance of one of these device is 12 ohms and the resistance of the other device is 4 ohms the total resistance of the two divice?
Wiki User
∙ 12y ago
For resistances in parallel, total effective resistance is [ 1 divided by (1/R1 + 1/R2 + 1/R3 + . . . . . etc.) ]
For two resistors, this expression can be massaged to show that the net effective resistance is
(R1 R2) / (R1 + R2).
(12 x 4) / (12 + 4) = 48/16 = 3 ohms.
Wiki User
∙ 14y ago
Wiki User
∙ 11y agoTheir net effective resistance is 3 ohms.
That is, you could rip them both out and replace them with a single
3-ohm resistor, and the power supply wouldn't know any difference.
Wiki User
∙ 15y agoThe total resistance is 3 ohms. Scroll down to related links and look at "Parallel Resistance Calculator".
Wiki User
∙ 15y agoThe total resistance is 3 ohms. Scroll down to related links and look at "Parallel Resistance Calculator".
Wiki User
∙ 12y agoBy me giving you the answer doesn't help you to learn. See related links, this should help you along.
Wiki User
∙ 10y ago4
1/x
-
12
1/x
=
1/x
gives the answer 3 ohms.
Wiki User
∙ 15y agoa
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No. Load resistance is the value of the element actually doing the work of the circuit it is connected to. A speaker connected to an amplifier is the load.
What is a resistance circuit?
It does not contain unidirectional outputAnswerA purely resistive circuit is an 'ideal' circuit that contains resistance, but not inductance or capacitance.
Why doesn't LC circuit exist?
even though a resistance is not connected in a circuit, it would practically have small resistance due to its components.so practically a LC circuit dosent exist..only a RLC circuit exists
What is a purely resistive circuit?
It does not contain unidirectional outputAnswerA purely resistive circuit is an 'ideal' circuit that contains resistance, but not inductance or capacitance.
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If additional resistance is connected in parallel with a circuit the supply voltage will decrease?
If additional resistance is connected in parallel with a circuit the supply voltage will decrease?
What happens to supply voltage if additional resistance is connected in parallel circuit?
No change in supply voltage as additional resistance is connected in parallel circuit.
What is the equivalent resistance of the parallel circuit you have connected?
In principle, it is infinite. I have not connected a parallel circuit in ages.
What is the equivalent resistance of a circuit that contains two 50.0 resistors connected in series to a 12.0 v battery?
100.0 (apex)
Is every resistance load resistance?
No. Load resistance is the value of the element actually doing the work of the circuit it is connected to. A speaker connected to an amplifier is the load.
What is the totalresistance in a curcuit that contains three 60 ohms resistors connected in a series?
In a series circuit, just add all the individual resistances, to get the total resistance.
Does a Resistor have a different resistance when connected to a power source vs if the resistance is tested when the resistor is out of circuit?
In the circuit it is connected to other devices with their own properties that can influence your reading. Out of circuit you just measure the resistor. It has the same value both ways.
Why one of the leads of resistor connected in electronic circuit is opened while measuring its resistance?
You open one of the leads of resistor connected in electronic circuit while measuring its resistance in order to not introduce error cause by other components in the circuit.
What happen when ammeter connected in parallel?
an ideal ammeter has zero or negligible resistance when this is connected in series no effective resistance would be added in the circuit so that the value of curret that we get is exactly of the circuit only. but when the ammeter is connected in parllel as it has zero resistance , the resistor to which it is connected in parllel gets shorted and due to his the effective resistance of the circuit is changed and so the effective current ... due to this the w=value measured by the ammeter would be different (incresed due to dec. in effective resistance)
What is a resistance circuit?
It does not contain unidirectional outputAnswerA purely resistive circuit is an 'ideal' circuit that contains resistance, but not inductance or capacitance.
What will happen to a buzzer connected to a circuit?
If it is connected in series with a circuit then it might raise the resistance too high and fail the system. Parallel connection is a circuit is probably the best bet you have.
