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Need help for this transformers question (1 Viewer)
- Thread starter rcpleo
- Start date
eshay lad 69
Member
thats funny because This question comes from the Exam Choice 2010 Physics Paper. With what I learnt in class, I don't understand how is the answer C. Any help is greatly appreciated. Thanks in advance
Screen shot 2012-03-12 at 9.34.55 PM.png
Screen shot 2012-03-12 at 9.34.55 PM.png
Fizzy_Cyst
Owner @ Sigma Science + Phys Goat
use faraday/lenz
EMF = -n (delta_phi/delta_t)
EMF is basically represented as the gradient of the graph, multiplied by -1.
At beginning, grad is max and positive, hence emf will be max and negative
then at turning point grad is zero, hence emf will be zero, after half a turn, grad is max and negative, hence emf max and positive, it then instantaneously changes back to what it was at beginning.
EMF = -n (delta_phi/delta_t)
EMF is basically represented as the gradient of the graph, multiplied by -1.
At beginning, grad is max and positive, hence emf will be max and negative
then at turning point grad is zero, hence emf will be zero, after half a turn, grad is max and negative, hence emf max and positive, it then instantaneously changes back to what it was at beginning.
Fizzy_Cyst
Owner @ Sigma Science + Phys Goat
The induced EMF graph will be a mirror image of the change in flux vs time graph 