EXAM #2: 1) Two point charges experience a force of repulsion equal to 3 x 10N when separated by 0.4m. If one of the charges is 5 x 10* C, what is the magnitude of the other charge? a) 1.07x10 b) 2.7 x10 ! )3.2x10* d)5x10* e)0 2) A parallel- plate capacitor has capacitance C. If the area of the plates is doubled, while the separation between the plates is halved, the new Capacitance will be? a) 2C b) 4C c)% d) 1C e)-i- 3) What is the Capacitance of a parallel - plate capacitor made up of two aluminum plates, 4 cm in length on a side and separated by 5 mm? a) 2.83x10* b)2.83x10% )2.83x10" d)2.83x10* e)l 4) If 10) of work is required to move 2C of charge in a uniform electric field, the potential difference present is equal to? a) 20 b) 12 c)8 d)5 e)l