A closely wound, circular coil with radius $2\mathrm{.}30$ cmcm has $730$ turns.

Part A

What must the current in the coil be if the magnetic field at the center of the coil is $0\mathrm{.}0790$ TT$?$

Express your answer with the appropriate units.

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II $=$

nothingA

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Part B

At what distance xx from the center of the coil, on the axis of the coil, is the magnetic field half its value at the center?

Express your answer with the appropriate units.

Activate to select the appropriates template from the following choices. Operate up and down arrow for selection and press enter to choose the input value typeActivate to select the appropriates symbol from the following choices. Operate up and down arrow for selection and press enter to choose the input value type

xx $=$

nothingcm

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