# Kirchoff's Laws for Currents in a Circuit

• mriney
In summary, the task is to determine the magnitudes and directions of the currents through each resistor shown in Fig. 19-38. The given information includes the emfs of two batteries, the values of three resistors, and the equations to use for solving the problem. The direction of the currents has already been determined, but assistance is needed in calculating the magnitudes.
mriney

## Homework Statement

Determine the magnitudes and directions of the currents through each resistor shown in Fig. 19-38. The batteries have emfs of [PLAIN]http://www.webassign.net/images/scriptE.gif1 = 9.0 V and [PLAIN]http://www.webassign.net/images/scriptE.gif2 = 17.0 V and the resistors have values of R1 = 15 [PLAIN]http://www.webassign.net/images/omegacap.gif, R2 = 20 [PLAIN]http://www.webassign.net/images/omegacap.gif, andR3 = 34[PLAIN]http://www.webassign.net/images/omegacap.gif.

## Homework Equations

Kirchoff's Loop Rule: I1+I2+I3=0
Kirchoff's Series Law?: V1+V2+V3=0

## The Attempt at a Solution

I've actually gotten the direction for all three, I just need some serious help calculating the magnitudes.

Last edited by a moderator:

Chet

## What are Kirchoff's Laws for Current?

Kirchoff's Laws for Current are two principles used in circuit analysis to determine the flow of current in a circuit.

## What is Kirchoff's First Law for Current?

Kirchoff's First Law for Current, also known as the Law of Conservation of Charge, states that the total current entering a junction in a circuit must equal the total current leaving the junction.

## What is Kirchoff's Second Law for Current?

Kirchoff's Second Law for Current, also known as the Voltage Law, states that the total voltage around a closed loop in a circuit must equal the sum of the voltage drops in that loop.

## How are Kirchoff's Laws for Current used in circuit analysis?

Kirchoff's Laws for Current are used to set up and solve equations to determine the current flow in a circuit. These laws are essential in understanding and analyzing complex circuits.

## What are the limitations of Kirchoff's Laws for Current?

Kirchoff's Laws for Current assume ideal conditions in a circuit, such as no resistance in conductors and no voltage drops in wires. In real-life circuits, these assumptions may not hold true, leading to some limitations in the accuracy of the results obtained using these laws.

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