The power consumed by the 4 V battery is

Options

A. 4 W
B. 8 W
C. 7 W
D. annot be calculated

Answer

A

Explanation

Current in the circuit,
`I = ( E _(n et))/( R _( n et)),` where `E _( n et) & R _(n et)` represents Rret net emf of the circuit and net resistance of the circuit respectively.
`implies I = ( 10 - 4)/( 6) = 1 A`
` therefore` Power consumed by battery
`P = V xx I ,` where V & I represents volage and current to the circuit.
`implies P = 1 xx 4 =4 W`