Calculate the resistance of wire and current
A wire 2.0mm in diameter and 4cmlong is connected to a 12V battery. If the resistivity of the wire is 3.5 x 10^-5 ohm-m; calculate the resistance of wire and its current?
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A 150 ohm combination of resistors draws 2 mA of current when connected across a battery. If you now add a 1 ohm resistor in series with this combination, there will be hardly any change in the current drawn from the battery.
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