Three charges, all with a charge of 10 C are situated as shown (each grid line is separated by 1 meter).

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1 Three charges, all with a charge f 0 are situated as shwn (each grid line is separated by meter). ) What is the net wrk needed t assemble this charge distributin? a) +0.5 J b) +0.8 J c) 0 J d) -0.8 J e) -0.5 J +y +x ) What is the electric ptential at the rigin? a) +94,900 b) +45,000 c) 0 d) -45,000 e) -94,900 3) What is the magnitude f the net frce n the lwer charge due t the tw upper charges? a).07 N b).058 N c).036 N d).09 N e) 0 N 4) What is the directin f the frce n the upper left charge due t the ther tw? a) up and t the right b) up and t the left c) dwn and t the right d) dwn and t the left 5) What is the directin f the net electric field at the rigin? a) up b) dwn c) left d) right

2 Yu are given the fllwing circuit with fur capacitrs and a battery (where > > 3 > 4). 6) What is true abut the ttal capacitance f the circuit cmpared t? a) ttal is greater than b) ttal is less than c) ttal is equal t d) it depends n the values f the capacitances e) it depends n the value f the battery vltage 3 7) mpare the charge n capacitrs, 3, and 4. 4 a) Q = Q 3 = Q 4 b) Q = Q 3 > Q 4 c) Q > Q 3 = Q 4 d) Q < Q 3 = Q 4 e) Q = Q 3 < Q 4 8) mpare the vltage drp acrss capacitrs, 3, and 4. a) = 4 > 3 b) > 4 = 3 c) > 4 > 3 d) < 4 = 3 e) = 4 = 3 Yu are given the fllwing circuit with =, = 3, = 6, and = F (the switch has been pened fr a lng time): 9) alculate the current thrugh the battery right after the switch is clsed. a) 6.0 A b) 4.0 A c) 3.0 A d).0 A e) 0 A 0) alculate the current thrugh the battery after the switch has been clsed a lng time. a) 6.0 A b) 4.0 A c) 3.0 A d).0 A e) 0 A

3 Given fllwing setup f three wires in the plane f the page with I = A, I = A, I3 = 3 A (directins shwn by the arrws) and each wire is separated by 4 m. I I I3 ) What is the directin f the magnetic field at wire 3 due t wires and? a) up b) dwn c) int the page d) ut f the page ) What is the directin f the frce n wire 3 due t wires and? a) up b) dwn c) int the page d) ut f the page 3) What is the magnitude f the field at the lcatin f wire 3 due t wires and? a) 3.5 x 0-8 T b) 4.5 x 0-8 T c) 5.5 x 0-8 T d) 6.5 x 0-8 T e) 7.5 x 0-8 T 4) What is the magnitude f the frce n m f wire 3 due t wires and? a) 5.5 x 0-7 N b) 4.5 x 0-7 N c) 3.5 x 0-7 N d).5 x 0-7 N e).5 x 0-7 N

4 Given tw lps mving in/ut f a magnetic field as shwn (when shwn, the lps are partially in and partially ut f the field and mving in the directin shwn). The field pints ut f the page and the lps are mving in the plane f the page. The lps are identical (with the same resistance) with the lengths being twice as big as the widths. They bth mve with the same velcity. 5) What are the directins f the currents induced? Lp a) bth are W b) bth are W c) bth are zer d) lp is W, lp is W e) lp is W, lp is W 6) mpare the magnitude f the vltages induced. a) lp has a greater induced vltage b) lp has a greater induced vltage c) neither lp has an induced vltage d) they have the same induced vltage e) ne must knw the length f the lp, the velcity, and field strength t answer this questin Lp 7) What is the directin f the magnetic frce n lp as it enters the field? a) up b) dwn c) left d) right

5 Given an L circuit cnnected t an A generatr as shwn with =, L = 58 mh, and unknwn. The generatr vltage scillates at a frequency f 60 Hz. 8) What is X L? a) b) c) 3 d) 4 e) 5 ~ L 9) If the circuit is at its resnance frequency, what is? a) 0 F b) F c) F d) 3 F e) 4 F 0) At this resnance frequency, what is the impedance Z? a) b) c) 3 d) 4 e) 5 ) What describes the current thrugh the generatr and the vltage acrss the generatr? a) the current leads the vltage acrss the generatr b) the current lags the vltage acrss the generatr c) the current is in phase with the vltage acrss the generatr d) it depends n the current in the circuit e) there is n current in the circuit ) If the frequency is reduced, what will happen t the abve answer? a) nw the current leads the vltage acrss the generatr b) nw the current lags the vltage acrss the generatr c) nw the current is in phase with the vltage acrss the generatr d) nw it depends n the current in the circuit e) nw there is n current in the circuit

6 Unplarized light with initial intensity f I ges thrugh tw linear plarizers. The first plarizer has a transmissin axis at an angle f 30 with respect t the vertical and the secnd plarizer has a transmissin axis at an angle f 60 with respect t the vertical. 3) What is the final intensity f light? a) 0.75 I b) 0.65 I c) 0.5 I d) I e) 0 4) If a third plarizer with a transmissin axis at an angle f 70 t the vertical, where shuld it be placed t maximize the intensity f transmitted light? a) befre the first plarizer b) between the plarizers c) after the secnd plarizer d) it des nt matter e) it depends n I 5) Where shuld this third plarizer be placed t minimize the intensity f transmitted light? a) befre the first plarizer b) between the plarizers c) after the secnd plarizer d) it des nt matter e) it depends n I

7 F ma kqq U r A d p Online Physics Frmulas kq q F r U q Q F E q kq r U Q s s kq E r E d Q I t L I P I Q Q e A t I Q Q e F qvbsin F ILB sin B r B ni mv r B BAcs emf vbl qb emf N t Z B X L X P rms I rms cs c I I cs LI U s s p N p tan U X L X p t N I Z rms rms X c X L fl f f c f L E B E cb 9 k Nm / / m N q 9 e / 8 c 30 m / s Tm A

8 ON-LINE PHYSIS EXAM # M. POTTE Name: Date: ) Bubble in the ID number sectin f the scantrn. ) Yu may use nly a pencil and calculatr. (Frmula sheet is prvided.) 3) Use the test as scratch paper (r the paper prvided by the testing center). Hand EEYTHING back in r yu will receive a 0 n the exam! 4) Scring: all 5 answer chice questins are 6 pts. each, all 3 answer chice questins are 3 pts. each, all answer chice questins are pts. each. Ttal pssible pints = 50 pts. 5) This is test frm. Be sure t write this n yur scantrn frm. All frms are equivalent tests (nly numbers have been changed.) 6) Als, write yur name, the class, the date, and my name n the scantrn frm. Gd Luck!