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(a) Three resistors 2 Omega 4 Omega and ...

(a) Three resistors `2 Omega 4 Omega and 5 Omega` are combined in parallel. What is the total resistance of the combination ?
(b) If the combination is connected to a bettery of emf 20 V and neglibible internal resistance, determine the current through each resistor, and the total current drawn from the battery.

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