Calculating Energy Transfer in a Radio with Current and Voltage

[Sace Ver]

Homework Statement

How much energy is transferred to a radio if a current of 0.40A run through it for 1.5 minutes with 115V?

V=115V
I=0.40A
t=1.5 min

Homework Equations

Not sure which equation to use.

The Attempt at a Solution

Not sure which equation to use.

 

[PietKuip]

Use the GUESS method: Given, Unknown, try to find an Equation that kind of fits the given and unknown quantities (or just multiply every given number), Substitute the numerical values, "Solve".

(None of this requires any insight in the physics, of course. It is just a way of getting through schools with this kind of teaching.)

 

[Sace Ver]

Use the GUESS method: Given, Unknown, try to find an Equation that kind of fits the given and unknown quantities (or just multiply every given number), Substitute the numerical values, "Solve".

(None of this requires any insight in the physics, of course. It is just a way of getting through schools with this kind of teaching.)

I could use Q=Ixt right?

 

[SteamKing]

I could use Q=Ixt right?

Is Q energy, or something else?

What's the definition of electric current?

 

[PietKuip]

I could use Q=Ixt right?

Yes, the charge Q is proportional to current and duration, but there is no build-up of charge in a radio, it is not very relevant in this context.

 

[Sace Ver]

Is Q energy, or something else?

What's the definition of electric current?

Okay first I would use Q=Ixt and then I would use E=VQ.

 

[PietKuip]

Okay first I would use Q=Ixt and then I would use E=VQ.

And that would be the right answer!
(But it also reveals a complete lack of understanding... I am not blaming you, it is the way you are being taught.)