Current Electricity and Electrical InstrumentHard

Question

A battery of internal resistance 4W is connected to the network of resistance as shown. In the order that the maximum power can be delivered to the network, the value of R in W should be: -

Options

A.
B.2
C.
D.18

Solution

             

This is balanced wheat stone bridge
From maximum power transfer theorem
Internal resistance = External resistance
⇒ 4 = ⇒  4 = 2R ⇒ R = 2Ω

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