How much power is produced if a voltage of #12 V# is applied to a circuit with a resistance of #288 Omega#?

Answer 1

I got #0.5W#

We know that Power is Work/Energy transformed in one second. In terms of Electricity we know that Power #P# is:

#P=VI#

this tells us that Voltage, #V#, which is the energy transported per charge (#E/q#) is multiplied by the Current #I#, which is charge passing each second (#q/t#). So we get:

#Power=VI="Energy"/cancel("Charge")*cancel("Charge")/"Time"="Energy"/"Time"#

we can now use Ohm's Law #V=RI# that can be written as:

#I=V/R# and substituted into the Power to get:

#P=VI=VV/R=V^2/R=(12)^2/288=0.5W#

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Answer 2

Axel Acevedo

The power produced in the circuit is 0.5 watts.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.