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Physics 6B Ch19worksheet Solutions

# Physics 6B Ch19worksheet Solutions - PHYSICS 6B Ch.19...

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PHYSICS 6B Ch.19 Worksheet Solutions clas.ucsb.edu/staff/vince 1) A cell phone has a battery that supplies it with a current of 0.22A. How many electrons pass through the circuit in 4.5 s? electrons 10 2 . 6 10 6 . 1 sec) 5 . 4 )( 22 . 0 ( 18 electron C 19 sec C 2) A battery with an emf of 1.5 V delivers a current of 0.44 A to a flashlight bulb for 64 sec. Find (a) the charge that passes through the circuit (in Coulombs) and (b) the work done by the battery (in Joules). J 24 . 42 ) s 64 )( 66 . 0 ( work time work P 66 . 0 ) A 44 . 0 )( V 5 . 1 ( IV P Coulombs 16 . 28 Q sec 64 Q A 44 . 0 s J s J 3) Wire 1 has a length L and circular cross section of diameter D. Wire 2 is constructed from the same material as wire 1 and has the same shape, but its length is 2L, and its diameter is 2D. The resistance of wire 2 is (a) half that of wire 1. (b) the same as that of wire 1. (c) twice that of wire 1. (d) four times that of wire 1. 1 2 1 2 2 2 2 D 2 2 2 2 2 D 1 R R ) D ( L 2 ) ( ) L 2 ( R ; ) D ( L 4 ) ( L R 4) A current of 1.8 A flows through a copper wire 1.75 m long and 1.1 mm in diameter. Find the potential difference between the ends of the wire.

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Physics 6B Ch19worksheet Solutions - PHYSICS 6B Ch.19...

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