An iron wire with a diameter of 2 mm will be used to connect a voltage source to a 100 kΩ resistor. Numbers for conductivity and resistivity can be found in the textbook. (a) What is the current needed to flow through the resistor if the resistor is to produce 1 mW of heat? (b) How long would your iron wire have to be to produce a 0.01 V drop along the length of the wire, assuming the current you found in (a)? (c) How much power is lost through the iron wire (assume the length you find in (b))?
An iron wire with a diameter of 2 mm will be used to connect a voltage source to a 100 kΩ resistor. Numbers for conductivity and resistivity can be found in the textbook. (a) What is the current needed to flow through the resistor if the resistor is to produce 1 mW of heat? (b) How long would your iron wire have to be to produce a 0.01 V drop along the length of the wire, assuming the current you found in (a)? (c) How much power is lost through the iron wire (assume the length you find in (b))?
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An iron wire with a diameter of 2 mm will be used to connect a voltage
source to a 100 kΩ resistor. Numbers for conductivity and resistivity can be found in
the textbook.
(a) What is the current needed to flow through the resistor if the resistor is to produce
1 mW of heat?
(b) How long would your iron wire have to be to produce a 0.01 V drop along the
length of the wire, assuming the current you found in (a)?
(c) How much power is lost through the iron wire (assume the length you find in (b))?
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