Consider an electron moving through a light bulb in a closed circuit. Does the electric potential increase or decrease? Does the electric potential energy increase or decrease?
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A: This question can easily be solved by applying the concept of potential and potential energy.
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Consider an electron moving through a light bulb in a closed circuit. Does the electric potential increase or decrease? Does the electric potential energy increase or decrease?
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- A large laser used to ignite a fusion reaction requires short pulses of energy. The energy is supplied by capacitors stored in large rooms. The total capacitance is 6.2 x 10-2 F when a voltage of 10 kV is applied across all the capacitors. These capacitors produce 5.0 ns pulses of energy and are charged with a 2 kW generator. (a) What energy is stored in the capacitors? (b) What power is produced when the capacitors discharge? (c) How long does it take to charge these capacitors?An electrical technician requires a capacitance of 2 µF in a circuit across a potential difference of 1 kV. A large number of 1 µF capacitors are available to him each of which can withstand a potential difference of not more than 400 V. Suggest a possible arrangement that requires the minimum number of capacitors.The difference in electric potential between a thunder cloud and the ground is 2.13 108 V. Electrons move from the ground which is at a lower potential to the cloud which is at a higher potential. Determine the change in electric potential energy of one of the electrons that move to the cloud.
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- You wish to lift a 50 kg mass up a distance of 20 m. You use an electric motor to do the job that plugs into the wall (120 V). How much charge will flow through the motor to complete this job? (Hint: Potential Energy is equal to mgh)A 4.50 pF capacitor is connected in series with a 3.00 pF capacitor and a 350 V potential difference is applied across the pair. (a) What is the charge on each capacitor (in nC)? 4.50 pF саpасitor 6.3e-10 X nC 3.00 pF сараcitor 6.3е-10 X nC (b) What is the voltage across each capacitor (in V)? 4.50 pF сараcitor V 3.00 pF сараcitor VI need hep solving this problem related to electric potential and electric potential energy.
- Consider what happens when a person moves around in dry conditions. The rubbing of motion leads to static electric charge building up on the body. Assume the capacitance of the human body to be about 155 pF. a) How much charge would have to build up on a body to generate a potential difference of 10 kV? b) A particular cell phone can have its circuits destroyed if exposed to an electric shock containing 300 u.J of energy. What voltage does that correspond to if the shock is coming from a human body?In the figure below, capacitor 1 (C₁ 29.0 μF) initially has a potential difference of 59.0 V and capacitor 2 (C₂ = 6.00 μF) has none. The switches are then closed simultaneously. C₁ = = C₂ (a) Find the final charge on each capacitor after a long time has passed. Q1 C с (b) Calculate the percentage of the initial stored energy that was lost when the switches were closed. %a) The network of capacitors shown in the image are all uncharged when a 364V potential is applied between points A and B with the switch S open. How much energy is stored in the network of capacitors? b) The network of capacitors shown in the image are all uncharged when a 185V potential is applied between points A and B with the switch S open. What is the voltage across the lower right 2.0µF capacitor when all of the capacitors are fully charged?