如何计算Faradays Law
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Faraday's law relates changing magnetic flux to induced electromotive force. It's the principle behind transformers, generators, and induction cooktops.
公式
The calculator applies EMF = -dΦ/dt
- EMF
- -dΦ/dt — -dΦ/dt
分步指南
- 1Enter magnetic flux change and time interval
- 2The calculator applies EMF = -dΦ/dt
- 3Results show induced voltage magnitude
例题解析
输入
ΔΦ = 0.1 Wb, Δt = 0.001 s
结果
EMF = 100 V
Rapid flux change induces high voltage
常见错误注意事项
- ✕Ignoring the rate of change; steady flux produces no EMF
- ✕Forgetting that area and angle both affect flux
常见问题
What does the negative sign mean?
It represents Lenz's law: induced current opposes the change causing it.
How do transformers use Faraday's law?
Changing current in primary coil creates changing magnetic field, inducing voltage in secondary coil.
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