Hi can I have some help please ? 10. At a distance of 0. 12 m from a point charge, the charge produces an electric field 2.5 x 103 N/C. toward the charge. The charge producing this field is A. 3.3 x 10-8 C B. -3.3 x 10 8 C C. +4.0 x 10-9 C D. -4.0 x 10-9 CUse the following information to answer question 1 1. an experiment using a Millikan apparatus, a negatively charged plastic sphere is suspended between oppositely charged, parallel plates. The mass of the sphere ; 145 x 10-14 kg. The electric potential difference between the plates is 5.50 x 103 the plates are 2.3 x 10-2 m apart. 1. The magnitude of the charge on the sphere is A. 4.9 x 10-19 C B. 4.8 x 10-18 C C. 1.1 x 10-8 C D. 1.1 x 10-7 C

Use the following information to answer questions 12 and 13. A liquid crystal display (LCD) television uses a cold cathode fluorescent bulb as a light burce. The bulb is filled with low-pressure mercury gas. Electrons are accelerated from one electrode to the other, producing a current of 5.00 x 10-3 A in the bulb. Cold Cathode Bulb Negatively Hg charged Hg Hg Positively electrode charged Hg Hg electrode some of the accelerated electrons collide with atoms of mercury gas, Hg, in the bulb, causing electrons in the atoms to undergo transitions to higher energy levels. The excited mercury atoms can reach lower energy states through a variety of transitions. Characteristic photons emitted through this process have wavelengths of 254 nm and 185 nm. The emitted photons strike a fluorescent coating on the inside surface of the glass bulb. The fluorescent coating then emits electromagnetic radiation that illuminates the picture. 12 The maximum number of electrons that would move through the bulb in 1.20 x 10 s of operation is A. 7.50 x 1020 electrons B. 3.75 x 1018 electrons C. 3.13 x 1016 electrons D. 2.60 x 1014 electrons 13. The difference in energy of the energy states associated with a characteristic photon that has the higher energy is A. 7.83 x 10-28 J B. 1.08 x 10-27 J C. 7.83 x 10-19 J D. 1.08 x 10-18 J