This figure depicts a cross-section of a resistor made out of a solid metal sphere of radius r by cutting off its “poles" and its schematic connection to the outside circuit (establishing the direction of the current flow). The resistivity of the metal is p. If the voltage drop across this resistor equals to V, what is the magnitude E of the driving electric field right at the center of the resistor? a r a
This figure depicts a cross-section of a resistor made out of a solid metal sphere of radius r by cutting off its “poles" and its schematic connection to the outside circuit (establishing the direction of the current flow). The resistivity of the metal is p. If the voltage drop across this resistor equals to V, what is the magnitude E of the driving electric field right at the center of the resistor? a r a
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Transcribed Image Text:This figure depicts a cross-section of a
resistor made out of a solid metal sphere of
radius r by cutting off its “poles" and its
schematic connection to the outside circuit
(establishing the direction of the current
flow). The resistivity of the metal is p. If the
voltage drop across this resistor equals to V,
what is the magnitude E of the driving
electric field right at the center of the
resistor?
a
r
a
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