Question

When a 12 V battery is connected across an unknown resistor , there is a current of 2.5 mA in a circuit. Find the value of the resistance of the resistor​

Answer 1

Answer:

from John's law

v=ir

12=2.5×10^-3×r

12=2.5/10^3×r

12×10^3/2.5=r

4800=r

or 4.8×10^3

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