Finding current in a resistor (in a big circuit)

In summary, the person is seeking help with finding the current in a 50ohm resistor marked with an 'x'. They mention using Norton and Thevenin equivalent circuits or node analysis and applying Ohm's law. Another person suggests using Kirchoff's Current Law and reminds the person that they cannot give out answers. The person then confirms that they solved the problem and asks for confirmation of their answer.
  • #1
notsuchawizkid
3
0
hi,

can anyone help me with this problem? i need to try find the current in the
50ohm resistor marked with an 'x'.

any help would be greatly appreciated!
 

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  • #2
What are the relevant equations for finding that current?
 
  • #3
i think it is supposed to be done my using norton and thevenin equivelent circuits or possibly node analysis? and then applying ohms law...

i do appreciate any help at all

thanks!
 
  • #4
Yes, I would use node analysis in the form of Kirchoff's Current Law to solve this problem. What can you tell us about how to apply the KCL? We do not give out answers here on the PF, but we can help to point you in the right direction.
 
  • #5
main point with KCL is that current into a node equals current out.I had another go at the problem with node analysis, and i got 0.15A approx, i think its right, can any1 confirm this
 

FAQ: Finding current in a resistor (in a big circuit)

How do I calculate the current in a resistor in a big circuit?

To calculate the current in a resistor in a big circuit, you will need to use Ohm's Law, which states that current (I) equals voltage (V) divided by resistance (R). You will also need to know the voltage of the circuit and the resistance of the resistor in question.

What is the formula for finding current in a resistor in a big circuit?

The formula for finding current in a resistor in a big circuit is I = V/R, where I is current in amperes (A), V is voltage in volts (V), and R is resistance in ohms (Ω).

What units are used to measure current in a resistor?

Current in a resistor is measured in amperes (A), which is a unit of electrical current. Other common units for current include milliamperes (mA) and microamperes (μA).

Can I use a multimeter to find the current in a resistor?

Yes, you can use a multimeter to find the current in a resistor. Set the multimeter to measure current (usually denoted by the letter "A") and place the meter in series with the resistor in the circuit. The reading on the multimeter will display the current in amperes.

Is the current the same at all points in a circuit?

In a series circuit, the current is the same at all points because there is only one path for the current to flow. In a parallel circuit, the current splits at each branch and the total current is equal to the sum of the currents in each branch. Therefore, the current may vary at different points in a parallel circuit.

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