Electrics questions This is a list of recently added questions about electrics. What is St. Elmo's Fire? ozone molecule 317 magnetic discharges 823 fireball 294 form of plasma. 1399 St. Elmo's fire is a form of plasma. The electric field around the object in question causes ionization of the air molecules, producing a faint glow easily visible in low-light conditions. Conditions that can generate St. Elmo's fire are present during thunderstorms, when high voltage differentials are present between clouds and the ground underneath. The nitrogen and oxygen in the Earth's atmosphere cause St. Elmo's fire to fluoresce with blue or violet light; this is similar to the mechanism that causes neon lights to glow Ts Share and bring new players to the game! 0 Very uninteresting Too difficult Poorly written Incorrect or questionable Correct this question wikipedia → St. Elmo's fire 3 Very interesting! Air questions What is the usual nominal voltage of an AAA battery? 1.2V 936 1.5V 6174 3.6V 382 12V 210 An AAA battery is a standard size of dry cell battery commonly used in low-drain portable electronic devices, such as TV remote controls, MP3 players and digital cameras. Ninjai Share and bring new players to the game! 0 Very uninteresting Too difficult Poorly written Incorrect or questionable Correct this question wikipedia → AAA battery 0 Very interesting! Electronics questions What resistor should be connected to the 12 Volt battery with a current flow of 4 Amp? 48 Ohm 674 4 Ohm 797 3 Ohm 2711 12 Ohm 486 According to Ohm's law, the resistance (R) of an object is defined as the ratio of voltage across it (V) to current through it (I) : R = V/I. R = 12/4 = 3. Ninjai Share and bring new players to the game! 0 Very uninteresting Too difficult Poorly written Incorrect or questionable Correct this question wikipedia → Ohm's law 0 Very interesting! Physics questions What is held in Leyden jar? Radioactive elements 2444 Electrical charges 4108 Alcohol 420 Acids 1130 Leyden jar is a device that stores static electricity between two electrodes on the inside and outside of a glass jar. It was the first known form of a capacitor (condenser). The glass plays the role of a dielectric material. smyru Share and bring new players to the game! 0 Very uninteresting Too difficult Poorly written Incorrect or questionable Correct this question wikipedia → Leyden jar 3 Very interesting! Electricity questions What may happen to a lead battery when overcharged? acid leak 8730 polarization switch 4211 explosion 13952 sulfurization 4696 Any lead-acid battery system when overcharged will produce hydrogen gas by electrolysis of water. If the rate of overcharge is small, the vents of each cell allow the dissipation of the gas. A severe overcharge may produce a flammable concentration of hydrogen. globalquiz.org Share and bring new players to the game! 0 Very uninteresting Too difficult Poorly written Incorrect or questionable Correct this question 0 Very interesting! Cars questions --> Play and see more questions Physics quiz