Is it possible to separate ampere-turns into N and I in the following question
A coil of copper wire produces 18000 ampere-turns when connected across 220v d.c. Mean length of each coil 0.75m resistivity of the copper is 0.01725μΩm. When the coil is connected across a 200V d.c supply it requires a 22Ω resistor to be connected in parallel to maintain the original supply current.
i) find the number of turns on the coil
ii) diameter of the copper wire
Im not sure how to find the original supply current i looked up some things and found that F=NI however it doesn't look like i can break NI up into single parts.
Any pointers would be much appreciated!
A coil of copper wire produces 18000 ampere-turns when connected across 220v d.c. Mean length of each coil 0.75m resistivity of the copper is 0.01725μΩm. When the coil is connected across a 200V d.c supply it requires a 22Ω resistor to be connected in parallel to maintain the original supply current.
i) find the number of turns on the coil
ii) diameter of the copper wire
Im not sure how to find the original supply current i looked up some things and found that F=NI however it doesn't look like i can break NI up into single parts.
Any pointers would be much appreciated!