Calculating Current & Voltage in Coil with Magnet

In summary, the conversation is discussing how to calculate the current and voltage induced in a 2m length of coil when a magnet passes through. The coil is 30mm in diameter with 1mm thick wire coiled around 200 times, and has a resistance of 16 ohms. The magnet is described as a cylindrical sphere with a diameter of just under 30mm, but the magnitude of its magnetic flux is unknown. The conversation also touches on the concept of magnetic flux and whether there is a formula for calculating it. The speaker is looking for a rough estimate and welcomes any ideas on how to proceed with the calculation.
  • #1
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I have been wondering how to calculate how much current and voltage would be induced through a 2m length of coil when a magnet passes through. The coil being 30mm in diameter with 1mm thick wire coiled around 200 times (for ease of calculation so cable would roughly be 18.8m long) with a resistance of say 16 ohms. Magnet being a cylindrical sphere of just under 30mm diameter... This is not homework, just wondered if there was a forumla? many thanks.
 
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  • #2


Dosent have to be precise. Any rough estimate will do. Thank you.
 
  • #3


"Magnet" is an unknown variable in this hypothetical. Magnitude of magnetic flux field is critical for calculating induced current.
 
  • #4


Magnetic flux? Is that the strength of the magnet? What if it were presumed to be average? Is there a formula?
 
  • #5


any ideas most welcome...
 

FAQ: Calculating Current & Voltage in Coil with Magnet

How do you calculate the current in a coil with a magnet?

To calculate the current in a coil with a magnet, you can use the formula I = V/R, where I is the current in amps, V is the voltage in volts, and R is the resistance in ohms. You will need to know the voltage and resistance of the circuit, as well as the number of turns in the coil and the strength of the magnet.

What is the relationship between current and voltage in a coil with a magnet?

The relationship between current and voltage in a coil with a magnet is governed by Ohm's Law, which states that current is directly proportional to voltage and inversely proportional to resistance. This means that as the voltage increases, the current will also increase, and vice versa. However, the resistance of the circuit can also affect this relationship.

How does the strength of the magnet affect the current and voltage in a coil?

The strength of the magnet can affect the current and voltage in a coil by inducing a magnetic field and causing a change in the flow of electrons. A stronger magnet will have a greater effect on the electrons, resulting in a higher current and voltage in the coil. This can also be influenced by the distance between the coil and the magnet.

Can you use any type of magnet to calculate current and voltage in a coil?

Yes, you can use any type of magnet to calculate current and voltage in a coil. However, the strength of the magnet may vary and can affect the accuracy of the calculations. It is important to use a consistent and reliable magnet for more accurate results.

What factors can affect the accuracy of calculating current and voltage in a coil with a magnet?

There are several factors that can affect the accuracy of calculating current and voltage in a coil with a magnet. These include the strength and type of magnet, the distance between the magnet and the coil, the resistance of the circuit, and any external magnetic fields that may interfere with the experiment. It is important to control these variables as much as possible for more accurate calculations.

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