If you have one or more resistive elements in a circuit connected in series, the current through them will be the same.
To make it easier to understand, think of the resistors as being bottlenecks in the circuit for the flow of electrons. The speed at which the electrons move in the circuit (aka - the current) is limited by the narrowest bottleneck. In this case, the narrowest bottleneck represents the most resistive element.
If the resistors are connected in series, the total resistance will be the sum of the resistances of each resistor, and the current flow will be the same thru all of them. if the resistors are connected in parallel, then the current thru each resistor would depend on the resistance of that resistor, the total resistance would be the inverse of the sum of the inverses of the resistance of each resistor. Total current would depend on the voltage and the total resistance
The current can't be calculated from the information given in the question.The power rating of a resistor is the maximum power it can dissipate before it overheatsand its resistance possibly changes permanently. The power rating is not the amount ofpower it always dissipates.So, all we really know about the resistor in the question is that its resistance is 21 ohms.And all we can say about the current through it is:Current through the resistor = (voltage between the ends of the resistor) divided by (21).
-- The current in each individual resistor is (voltage across the whole circuit) divided by (the resistance of the individual resistor). -- The current in any individual resistor is less than the total current in the circuit. -- The total current in the circuit is the sum of the currents through each individual resistor.
A resistor and a diode are not the same. A resistor reduces the amount of current going through a wire. It turns current into heat. A resistor does the same thing wherever it is be it in a radio or an electric stove. An element in an electric stove that you have seen glowing red is a great big resistor. The element in an electric light bulb is a resistor. A diode contains is a material that only allows electricity to pass through in one direction. They are not the same. However, when an engineer builds a radio circuit, there are problems between theory and practice. A resistor not only reduces the amount of current but causes impedance. A capacitor not only carries capacitance but also has a degree of resistance. A diode not only makes the current flow in one direction but has a certain amount of resistance in the process. After the engineer has designed the circuit, he builds it. Then because the parts have all different characteristics besides the expected ones, he tweaks it until it works.
The current in each resistor in a series circuit is the same. Kirchoff's Current Law states that the sum of the currents entering a node must add up to zero. The connection between two resistors in a series circuit is a node. The current entering the node from one resistor is equal to the current leaving the node into the next resistor.
For the individual resistor, the current is constant, regardless of any other resister that's attached to it in parallel. The current that results from all the resistors combined decreases as the resistance of one or more of the resistors increases.
When resistors are connected in series in a circuit . the voltage drop across each resistor will be equal to its resistance, as V=IR, V is direct proportional to R. An A: The relationship is that the current will divide for each paths in a parallel circuit and the voltage drop across each will be the source voltage. In a series circuit the current will remain the same for each component but the voltage will divide to reflect each different component value. And the sum of all of the voltage drops will add to the voltage source
No, resistors are measured in ohms, not amps. Ohms represent the resistance offered by the resistor to the flow of current, whereas amps (amperes) represent the measure of current flowing through a circuit.
First of all, current goes straight through the resistor, not across it.If the potential difference between the ends of the resistor is 20 volts,and its resistance is 10,000 ohms, then the current through it isI = E/R = 20/10,000 = 0.002 ampere = 2 milliamperes
False. The total current in a parallel sub-circuit where all resistors have the same value cannot be found by multiplying the current by the number of resistors. In a parallel circuit, the total current depends on the individual resistor values and how they affect the overall resistance of the circuit.
Nothing. But the current is halved.
A: In a series circuit the currant is the same for all components but the IR drop will change foe each. By adding Resistance the current will decrease accordingly