- #1
ice109
- 1,708
- 6
im thinking of the classic airplane problem. the one where the flying airplane develops a voltage across its wingspan. now this was posed to me as a motional emf problem and i bought it then but simultaneously thought that it seemed like a hall effect problem.
so two questions
now that i think back. how is this a motional emf problem?there's no current loop? the only way i could see it as that if you thought of the wingspan as an antenna that developed a voltage across simply because of E field that is concomitant to the Earth's B field. but how is there a [tex]\frac{d\phi}{dt}[/tex]?
and
how can i solve a problem like this as a hall effect problem?
i can't find one right now but any random numbers would do
airplane flying 30m/s and having a 30m wingspan.
edit
this is not a homework problem, the numbers are simply to serve as an example
so two questions
now that i think back. how is this a motional emf problem?there's no current loop? the only way i could see it as that if you thought of the wingspan as an antenna that developed a voltage across simply because of E field that is concomitant to the Earth's B field. but how is there a [tex]\frac{d\phi}{dt}[/tex]?
and
how can i solve a problem like this as a hall effect problem?
i can't find one right now but any random numbers would do
airplane flying 30m/s and having a 30m wingspan.
edit
this is not a homework problem, the numbers are simply to serve as an example
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