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184_notes:b_flux_t [2018/11/16 02:08] – dmcpadden | 184_notes:b_flux_t [2021/07/13 12:40] (current) – schram45 | ||
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Section 22.2 in Matter and Interactions (4th edition) | Section 22.2 in Matter and Interactions (4th edition) | ||
- | [[184_notes: | + | /*[[184_notes: |
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===== Changing Magnetic Fields with Time ===== | ===== Changing Magnetic Fields with Time ===== | ||
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{{youtube> | {{youtube> | ||
- | ==== Increasing Current to Steady State ==== | + | ===== Increasing Current to Steady State ===== |
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When you have a typical circuit (like a battery connected to a light bulb), the change in the magnetic field is small enough that the induced current in any nearby loop is probably negligible. However, as circuit components become smaller and smaller and are placed closer and closer together (with roughly the same amount of current), the induced currents (because of changing magnetic fields) can become an important consideration in the design of electronics. | When you have a typical circuit (like a battery connected to a light bulb), the change in the magnetic field is small enough that the induced current in any nearby loop is probably negligible. However, as circuit components become smaller and smaller and are placed closer and closer together (with roughly the same amount of current), the induced currents (because of changing magnetic fields) can become an important consideration in the design of electronics. | ||
- | ==== Flux through a Loop ==== | + | ===== Flux through a Loop ===== |
[{{ 184_notes: | [{{ 184_notes: | ||
As an example, let's consider a set of concentric coils, where the larger outside coil is initially connected to a battery so that it's current increases from 0 A to 1 A in 1 ns. What would be the induced potential in the smaller inner coil? | As an example, let's consider a set of concentric coils, where the larger outside coil is initially connected to a battery so that it's current increases from 0 A to 1 A in 1 ns. What would be the induced potential in the smaller inner coil? | ||
- | We know from Faraday' | + | We know from Faraday' |
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==== Examples ==== | ==== Examples ==== | ||
- | [[: | + | * [[: |
+ | * Video Example: Changing Current Induces Voltage in Rectangular Loop | ||
+ | {{youtube> |