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Phys 121 Spring 08 Exam 2 Pg 2

# Phys 121 Spring 08 Exam 2 Pg 2 - Physics 121 Common Exam 2...

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Unformatted text preview: Physics 121 Common Exam 2 A 5. A parallel plate capacitor being designed is supposed to have a capacitance of 600 pF. The area of each plate will be 10 cm2 and it will be ﬁlled with a material whose dielectric constant K is 1.5 (glass). What should the distance between the plates be? 1.5; _ [71/ J a if!“ ' 3 ”If.“ .4 J'yge ‘ a" :1 59.: 1%; . _i ,3: A) 0.022 mm. C x" ‘ Gaﬁ2:-§iv : K \$134; ‘0 J) B) 0-15 mm- ‘ 2 :2 21’: 2 l I"? 2 ,,,,, W“”“ C) 3.0 mm. 5 ”W D) 0.3 mm. ‘ —_ f} K . M E E) 15 mm. _, i0 2 :2 2 . 2 _2,, 6.. If 36 coulombs of charge pass through a wire in 3 minutes. What is the average current ﬂowing? A) 108A B) 6.0 A 1 2,? W iii.» .2 - .25 24 ‘ C), 12A was 2 _, \ D) )0.20A m ' g . ;, “ET 0.30 A 42,4. 2r r: :7 2_ 2 . . 7. Which of the following graphs shows the relationship between current and voltage for a device that obeys Ohm's Law? {A}? B) C) D) E) iZ t K i! l4 V V V V V 8. What are the magnitude and direction of the current in the wire marked 1' in the ﬁgure? A) 8 A (left) '13-)»3 8 A (right) C) 4 A (left) D) 4 A (right) E) 2 A (left) 4—1A2 Page 2 ...
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