chap24 - 24.1 C 10 82 1 F 28 7 V 25 4 × = = = μ CV Q 24.2...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 24.1: . C 10 82 . 1 ) F 28 . 7 )( V . 25 ( 4- × = = = μ CV Q 24.2: a) pF. 29 . 3 m 00328 . m 00122 . 2 = = = ε d A ε C b) . kV 2 . 13 F 10 29 . 3 C 10 35 . 4 12 8 = × × = =-- C Q V c) . m V 10 02 . 4 m 00328 . V 10 2 . 13 6 3 × = × = = d V E 24.3: a) . V 604 F 10 45 . 2 C 10 148 . 10 6 = × × = =-- C Q V b) . m 0091 . m) 10 328 F)( 10 45 . 2 ( 2 3 10 = × × = =-- ε . ε Cd A c) . m V 10 84 . 1 m 10 328 . V 604 6 3 × = × = =- d V E d) . C/m 10 63 . 1 ) m V 10 84 . 1 ( 2 5 6- × = × = = ⇒ = ε E ε σ ε σ E 24.4: d ε σ Ed V = = ∆ 2 2 12 2 12 Nm C 10 85 . 8 ) m 00180 . )( m C 10 60 . 5 (-- × × = =1.14 mV 24.5: a) μC CV Q 120 = = b) d A ε C = C 60 2 and 2 means 2 μ Q Q C C d d = → → → c) C 480 4 and , 4 , 4 means 2 μ Q Q C C A A r r = → → → → 24.6: (a) 12.0 V since the plates remain charged. (b) (i) C Q V = Q does not change since the plates are disconnected from the battery. d ε C A ⋅ = If d is doubled, V . 24 2 so , 2 1 = → → V V C C (ii) C C A A r r πr A 4 and , 4 then , 2 if so , 2 → → → = which means that V 00 . 3 4 1 = → V V 24.7: Estimate cm . 1 = r mm 8 . 2 F 10 00 . 1 ) m 010 . ( so 12 2 2 = × = = =- π ε C πr d d A ε C ε The separation between the pennies is nearly a factor of 10 smaller than the diameter of a penny, so it is a reasonable approximation to treat them as infinite sheets. 24.8: (a) Ed V = ∆ cm 00 . 1 m 10 ) C N 10 ( V 100 2 4 = = =- d d d R ε d A ε C 2 π = = 4 4 πε Cd πε Cd R = = ) C Nm 10 9 )( m 10 )( F 10 00 . 5 ( 4 2 2 9 2 12 × × =-- R cm 24 . 4 m 10 24 . 4 2 = × =- R (b) pC 500 ) V 100 )( pF 5 ( = = = CV Q 24.9: a) ) ( ln 2 a b r r πε L C = F 10 35 . 4 ) 50 . 00 . 5 ( ln 2 ) m 180 . ( 12- × = = πε C b) V 30 . 2 ) F 10 35 . 4 /( ) C 10 . 10 ( / 12 12 = × × = =-- C Q V 24.10: a) . 84 . 5 77 . 1 m F 10 5 . 31 2 2 ) ( ln ) ( ln 2 12 = ⇒ = × = = ⇒ =- a b a b a b r r πε L C πε r r r r πε L C b) . m C 10 19 . 8 ) m F 10 5 . 31 )( V 60 . 2 ( 11 12-- × = × = = L C V L Q 24.11: a) F/m. 10 56 . 6 ) mm 5 . 1 / mm 5 . 3 ( ln 2 ) ( ln 2 11- × = = = πε r r πε L C a b b) The charge on each conductor is equal but opposite. Since the inner conductor is at a higher potential it is positively charged, and the magnitude is: C. 10 43 . 6 ) mm 1.5 mm 5 . 3 ( ln ) V 35 . )( m 8 . 2 ( 2 ) ( ln 2 11- × = = = = ε r r LV ε CV Q a b π π 24.12: a) For two concentric spherical shells, the capacitance is: a a b b a a b a b b a r kC kCr r r r kCr kCr r r r r k C- = ⇒ =- ⇒ - = 1 . m 175 . m 150 . ) F 10 116 ( ) m 150 . )( F 10 116 ( 12 12 =- × × = ⇒-- k k r b b) . C 10 55 . 2 ) V 220 )( F 10 116 ( and , V 220 8 12-- × = × = = = CV Q V 24.13 : a) . F 10 94 . 8 m 125 . m 148 ....
View Full Document

Page1 / 24

chap24 - 24.1 C 10 82 1 F 28 7 V 25 4 × = = = μ CV Q 24.2...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online