Need to find the current in a wire

In summary, a wire with a length of 480 m is in a 0.45 T magnetic field and is experiencing a force of 3.56 N. To find the current in the wire, the equation F/L*B=I is used, where F is the force, L is the length of the wire and B is the magnetic field. The answer should be in units of mA.
  • #1
seagoing
2
0
A wire 480 m long is in a 0.45 T magnetic
field. A 3.56 N force acts on the wire.
What current is in the wire? Answer in
units of mA.


I don't even really know where to start with this one. A friend of mine and I have been going through a lot of equations but so far everytime there is an extra variable that we cannot find.
 
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  • #2
Wow, I was making this way too difficult then it needed to be.

I ended up using this equation:

F/L*B=I
 
  • #3
that is the right eqn. while putting the values take care of proper units.
 

FAQ: Need to find the current in a wire

What is the formula for calculating current in a wire?

The formula for calculating current in a wire is I = V/R, where I is the current in amperes, V is the voltage in volts, and R is the resistance in ohms.

How do I measure the current in a wire?

To measure the current in a wire, you will need a multimeter. Set the multimeter to measure DC current and then connect the probes to the wire. The reading on the multimeter will indicate the current in the wire.

Why is it important to know the current in a wire?

Knowing the current in a wire is important for various reasons. It allows us to determine the power consumption of a device, identify any potential safety hazards, and ensure that the wire can handle the amount of current flowing through it.

How does the current in a wire affect its temperature?

The current in a wire can increase its temperature due to the resistance of the wire. As the current flows through the wire, it encounters resistance, which causes some of the electrical energy to be converted into heat energy. This can lead to the wire becoming hot and potentially causing damage.

What factors can affect the current in a wire?

The current in a wire can be affected by factors such as the voltage applied to the wire, the resistance of the wire, and the type of material the wire is made of. Other factors that can affect the current include temperature, length, and thickness of the wire.

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