Problem 7: Calculate the current through a single loop circuit if ε= 120 V , R = 1000 Ω and internal resistance r = 0.01 Ω

Solution

Given emf = 120 V R = 1000 r = 0.01

Find current = I =?

The problem suggests two resistances in series and a single current I pass through them. The equivalent resistance is given by R + r. So apply Ohm’s law I = V/R to find the current. Put the values

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