2B 15. Consider the arrangement shown, where distance between the plates of narallel plate capacitor is d. When a potential difference V is applied reen the plates, electrons are emitted from the negative plate with sogligible initial velocity. These electrons are attracted towards the nositive plate creating a small electric current, which is registered in a micro-ammeter. What minimum magnetic field must be applied nerpendicular to the electric field in the capacitor so that the micro- ammeter registers no current? Denote charge and mass of an electron by symbols e and m respectively and neglect effects of gravity. Am: + 2mv a)
2B 15. Consider the arrangement shown, where distance between the plates of narallel plate capacitor is d. When a potential difference V is applied reen the plates, electrons are emitted from the negative plate with sogligible initial velocity. These electrons are attracted towards the nositive plate creating a small electric current, which is registered in a micro-ammeter. What minimum magnetic field must be applied nerpendicular to the electric field in the capacitor so that the micro- ammeter registers no current? Denote charge and mass of an electron by symbols e and m respectively and neglect effects of gravity. Am: + 2mv a)
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Transcribed Image Text:15. Consider the arrangement shown, where distance between the plates of
between the plates, electrons are emitted from the negative plate with
a parallel plate capacitor is d. When a potential difference V is applied
Trom the origin. :
Cose
9B
2B
ween the plates, electrons are emitted from the negative plate with
ogligible initial velocity. These electrons are attracted towards the
nositive plate creating a small electric current, which is registered in a
micro-ammeter. What minimum magnetic field must be applied
perpendicular to the electric field in the capacitor so that the micro-
ammeter registers no current? Denote charge and mass of an electron
by symbols e and m respectively and neglect effects of gravity.
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Ams:
2mv
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