Finding expresion for current through resistor

leopard · 2008-12-17T13:53:02+00:00

I want to find an expression for I_5. I see that I_{S1} = I_4 - I_5, but how can I proceed from here?

Thread starter leopard
Start date Dec 17, 2008
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Current Resistor

In summary, a resistor is an electrical component that limits the flow of current in a circuit. It is measured in units of amperes (A) using a multimeter. Ohm's law states that the current through a resistor is directly proportional to the voltage across it and inversely proportional to its resistance. In a series circuit, the current remains constant and can be found by dividing the total voltage by the total resistance. The current through a resistor can also be affected by voltage, resistance, temperature, and the overall design of the circuit.

Dec 17, 2008

leopard

I want to find an expression for [tex]I_5[/tex].

I see that [tex]I_{S1} = I_4 - I_5[/tex], but how can I proceed from here?

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Dec 17, 2008

buffordboy23

What other info were you given for the problem? What are the resistances, etc.?

Just use Kirchoff's voltage and current laws.

FAQ: Finding expresion for current through resistor

What is a resistor?

A resistor is an electrical component that limits the flow of current in a circuit. It is typically made of a material that resists the flow of electrons, causing a decrease in the amount of current passing through it.

How is current measured through a resistor?

Current is measured in units of amperes (A) and is typically measured using a multimeter. To measure the current through a resistor, the multimeter is set to amperes and connected in series with the resistor in the circuit.

What is Ohm's law and how does it relate to finding the expression for current through a resistor?

Ohm's law states that the current through a resistor is directly proportional to the voltage across it and inversely proportional to its resistance. This means that as the voltage increases, the current also increases, and as the resistance increases, the current decreases. This relationship is represented by the equation I=V/R, where I is current, V is voltage, and R is resistance.

How do you find the expression for current through a resistor in a series circuit?

In a series circuit, the current remains constant throughout. Therefore, the expression for current through a resistor in a series circuit is the same as the total current in the circuit, which can be found by dividing the total voltage by the total resistance. This can be represented by the equation I = V/R_total, where I is current, V is voltage, and R_total is the total resistance of the circuit.

What factors can affect the current through a resistor?

The current through a resistor can be affected by the voltage applied, the resistance of the resistor, and the temperature of the resistor. Additionally, the presence of other components in the circuit and the overall design of the circuit can also impact the current through a resistor.