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Draw a circuit diagram of an electric ci...

Draw a circuit diagram of an electric circuit containing a cell, a key, an ammeter, a resistance of `4 Omega` in series with a combination of two resistors `(8 Omega)` in parallel and a voltmeter across the parallel combination. Each of them dissipate maximum energy and can withstand a maximum power of `16 W` without melting. Find the maximum current that can flow through the three resistors.

Text Solution

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`1/(R')=1/8+1/8 rArr 1/(R')=1/4 rArr R' rArr 4 Omega`
total R =4+4=8`Omega`
`I^(2)=P/R rArr 16/8 rArr 2A`
`:. I =sqrt(2)A`
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