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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 battery of emf 20 V and negligible internal resistance, determine the current through each resistor, and the total current drawn from the battery.

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