find the value of resistance if a 12v battery reaches a current of 3mA?
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R=12V/3mA=4000 Ohm ans.
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r=v/i
r=12/3*10^-3
r=12*10^3/3
r=4*10^3
r=4000 ohm
r=12/3*10^-3
r=12*10^3/3
r=4*10^3
r=4000 ohm
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