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| 184_notes:induced_current [2021/11/12 23:13] – [Step 4.) $\Phi_{B,i}$, $\Phi_{B,f}$ and $\frac{d\Phi_{B}}{dt}$] stumptyl | 184_notes:induced_current [2021/11/12 23:15] (current) – [Step 1.) Draw a picture of your situation] stumptyl | ||
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| {{youtube> | {{youtube> | ||
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| + | **NOTE: In this chart there is a mistake in the chart being used: The variables " | ||
| ==== Right Hand Rule Steps ==== | ==== Right Hand Rule Steps ==== | ||
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| Before anything, you should start with a picture of your situation. We'll draw this in the first column of the table. For our example, we'll have a bar magnet that is moving away from a set of coils. In the picture, we have marked the coils, the orientation of the magnet (which side is north/ | Before anything, you should start with a picture of your situation. We'll draw this in the first column of the table. For our example, we'll have a bar magnet that is moving away from a set of coils. In the picture, we have marked the coils, the orientation of the magnet (which side is north/ | ||
| - | [{{184_notes: | + | [{{184_notes: |
| }}] | }}] | ||
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| For our example, the change in flux was negative. So we write down " | For our example, the change in flux was negative. So we write down " | ||
| - | [{{184_notes: | + | [{{184_notes: |
| ?440|Step 5: The sign of the V-induced is the **opposite** of the change in flux. }}] | ?440|Step 5: The sign of the V-induced is the **opposite** of the change in flux. }}] | ||
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| For our example, we found that $V_{ind}$ was positive. So this means that we would stick our thumb in the -x direction (pointing to the left) and then curl our fingers around in a circle. You should find the the current would go into the page at the top of the coil and would come back out of the page at the bottom of the coil. Just because it's often hard to draw the current direction in 3D, we often will just notate where on the coil the current is into/out of the page. | For our example, we found that $V_{ind}$ was positive. So this means that we would stick our thumb in the -x direction (pointing to the left) and then curl our fingers around in a circle. You should find the the current would go into the page at the top of the coil and would come back out of the page at the bottom of the coil. Just because it's often hard to draw the current direction in 3D, we often will just notate where on the coil the current is into/out of the page. | ||
| - | [{{184_notes: | + | [{{184_notes: |
| ?440|Step 6: Find the direction of the induced current based on the right hand rule. }}] | ?440|Step 6: Find the direction of the induced current based on the right hand rule. }}] | ||
| The right hand rule for determining the induced current direction is definitely more complicated than our previous right hand rules; however, this table helps break the process down into manageable chunks. We definitely recommend writing out each step in this way - otherwise it is easy to miss a step or a negative sign, which will throw off your final result. | The right hand rule for determining the induced current direction is definitely more complicated than our previous right hand rules; however, this table helps break the process down into manageable chunks. We definitely recommend writing out each step in this way - otherwise it is easy to miss a step or a negative sign, which will throw off your final result. | ||