{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Written Homework 14 Solutions

# Written Homework 14 Solutions - Physics221Fall2007 4...

This preview shows pages 1–3. Sign up to view the full content.

Physics 221Fall2007 Written Homework dueTuesday, December 4 1-- A bankof 5.0 pF capacitors, connected in parallel, is used to store electric energy. What does it cost to charge the 2000 capacitors of the bank to 50,000 V, assuming a cost of three cents per kW-hr? SToA€D fr-r€tGY lS !C Vt i=*A l\ CAPNc. I T",r\ CoSi- = \J= Looc t\$t 5 \\o 2 _ t l . Iq"?L Ko\i -q F\[s.tot vl' t-sv lor T ) o-ol \$ eosT= o. \c1l \$ ry- lo (- 5

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Physics 221 Fall2007 Wriuen Homework due Tuesday, December 4 2-- A certain substance has a dielectric constant of 2.8 and a dielectric strength of 18MV/m If it is used as the dielectric material in a parallel-plate capacitor, what minimum area should the plates of the capacitor have to obtain a capacitance of 7 .0 x l0-' FF and to en\$rre that the capacitor will be able to withstand a potential difference of 4.0 kV? Nrl \ NC L\P-gef E"- Fre L0 15 tK Yloc vl* {=oR \ N= tx\o' V Txa Freuo lN l}€ f= fr 0ttl-€c Ta*\c so Th€ i - A - \v \AJILL R€ Sr\&l-uE.sT A t5 a l r t f v t=:rvbL^ AV A a - fjAtAKk*rJ \,J \TF\ A KtlowtJ - \cuuc tr.c*- t\rnf: W€<, t r = J ' ^ )( I..lck 1_ /hN t { i i \ l
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### Page1 / 4

Written Homework 14 Solutions - Physics221Fall2007 4...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online