Deduce the formula of equivalent resistance in series combination. Write three resistance R1, R2, R3.
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v=v1+v2+v3
but v = IR
therefore, IR=IR1+IR2+IR3
IR=I(R1+R2+R3)
R=R1+R2+R3
formula for resistors in series
but v = IR
therefore, IR=IR1+IR2+IR3
IR=I(R1+R2+R3)
R=R1+R2+R3
formula for resistors in series
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