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physics quiz 4 - Quiz 4 Ch 18-19 ‘ FORM C Problem 1 Find...

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Unformatted text preview: Quiz 4: Ch 18-19 ‘ FORM C Problem 1 Find the current through the 12 S2 resistor. a I 1 =1.23 A C) 112: 3. ‘ ‘ d) liz= 1.65 A C) 112 = 1.50 A Problem 2 Find the current through R3. (El=]2V,E2=3V,E3=3V, R1=lQ,R2=5§2, R3=SQ) c) [3 =’0.60 A d) 13 = 0.30 A e) 13 = 0.79 A Problem 3 Lightbulb puzzle: Initially the switch is open. The current is the same through lightbulbs A and B whereas bulb C‘ is obviously not glowing. What happens to the brightness of A and B when the switch is closed. a) Brightness of A stays the same; B decreases b) Brightness of A'increases; B stays I' arm 0) Brightness of A increases; B decreases ' * d) Brightness of A decreases; B decreases e) Brightness of A decreases, B increases - / Identical bulbs ...
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