For the circuit of Figure 30-19, assume that EMF= 14.0 V, R = 5.40 , and L = 5.00 H. The battery is connected at time t = 0.(adsbygoogle = window.adsbygoogle || []).push({});

Picture:

http://www.webassign.net/hrw/hrw7_30-19.gif

Okay i know there is a simple formula to find the:

(a) How much energy is delivered by the battery during the first 2.00 s?

J

but i don't know where it is, anyone know it?

Also I tried part (b) and got it wrong for some reason:

How much of this energy is stored in the magnetic field of the inductor?

wrong check mark J

I used:

V = iR.

Ub = .5L*i^2;

i = 14/5.40 = 2.59 Amps

Ub = .5*5.00*2.59^2 = 16.77 but they didn't like that at all, any ideas?

thanks.

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# Homework Help: How much of this energy is stored in the magnetic field of the inductor?

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