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physics 232 cheat sheet 2 - QuickTimeTM and a...

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QuickTimeQ and a TIFF (Uncompressed) decompressor are needed to see this picture. Equivalent resistance concepts False: R cd is always less than or equal to R 3 . True: R ab is always less than or equal to R 1 . True: After connecting c and d to a battery, the current through R 3 always equals the current through R 4 . True: After connecting a and b to a battery, the voltage across R 1 always equals the voltage across R 2 . QuickTime and a TIFF (Uncompressed) decompressor are needed to see this picture. In the picture below, the two wires carry current i 1 and i 2 , respectively, with positive current to the right. The charge q is positive and has velocity v to the right. False: If i 2 = 0 and i 1 is greater than zero, then the force on q points into the page. True: If i 1 = 0 and i 2 is greater than zero then the force on q is south. True: If v = 0, then the force on q is zero. False: If i 2 = 0 and i 1 is greater than zero, then the magnetic field near charge q points out of the page.
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