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K1and K2 closed . Find total resistance. Answer 40ohm tell me how
If K1 and K2 are closed then 4 resistance of 20 ohm are short circuited as potential difference across them is same because they are connected by wire so current will flow through first 20 ohm resistor then throughwire having no resistance and then through last 20 ohm resistor.so total resistance will be 40 ohm.Hope it clears.
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