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NEET 2007 (AIPMT) · Electrical Power & Heating Effect

Electrical Power & Heating Effect question from NEET 2007 (AIPMT)

Q66NEET 2007 · AIPMTMedium

Electrical Power & Heating Effect

The total power dissipated in watt in the circuit shown here is

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Answer: (b)

$6\ \Omega \parallel 3\ \Omega = 2\ \Omega$ ; adding $4\ \Omega$ gives $R_{eq} = 6\ \Omega$ .
$I = 18/6 = 3\text{ A}$ .
$P = VI = 18 \times 3 = 54\text{ W}$ .
So the answer is (b) 54.

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