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According to Ohm’s law
V= IR
Therefore, I= V/R
Where,
R is the equivalent resistance of resistances 0.2 Ohm, 0.3 Ohm, 0.4Ohm, 0.5 Ohm and 12 Ohm.
These are connected in series.
Hence, the sum of the resistances will give the value of R.
R= R1 + R2 + R3 + R4 + R5
= 0.2 + 0.3 + 0.4 + 0.5 + 12 = 13.4 Ohm
The potential difference, V= 9 V
I = 9/13.4 = 0.671 A
When resistors are connected in series, the current is the same in all the resistors. Hence, current in 12 Ω resistor = 0.67 A.
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