4. A rechargeable flashlight battery is capable of delivering 80 mA for about 12 h. How much charge can it release at the rate? If its terminal voltage is 1.5 V, how much energy can the battery deliver in joules?
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- 5. A digital voltmeter indicates a voltage of 2.5 V when 10 of current flow through a resistor. What is the resistance of the resistor?A 12 Volt lead-acid car battery, engineered for "up to 500 or more charge/discharge cycles," has a rating of 225 Ampere-hours. A one Ampere-hour battery can provide one Amp of current for one hour. It sells for $180. a) If initially fully charged, what is the total electrical energy that the battery can deliver before it needs to be recharged? b) The battery has a mass of 23.1 kg. What total mass of such batteries would be required to deliver the same effective mechanical energy as 16 gallons of gasoline? Assume that the efficiency of an electrically powered car is 2.5 times that of a gasoline-powered car for the conversion to mechanical energy, and that energy content of 1 gallon of gas =1.32×108 Joules. You're going to get a big number - this is why electric cars didn't become widespread until after the development of lithium ion batteries, which can achieve much higher energy densities.A flashlight has 4 – AA batteries. The combination has a capacity of 200 watt-sec. How long in mins will it take to discharge if the flashlight consumes 10 mA at 6 V?
- Energizer battery is capable of delivering 85mA for about 12h. How much charge can it release at that rate? If its terminals voltage is 1.2V, how much energy can the battery deliver?1. Compute for the nunber of coulombs in the following amounts of electrons 2. Compute for the current given the charge flowA walkman has 4 –AA batteries. The combination has a capacity of 200 watt-sec. How long will it take to discharge if walkman consumes 10mA at 6V?
- wire sample (1mm in diameter by 1m in length) is placed in an electrical circuit at 20°c. A voltage drop of 432 mV is measured across the length of the wire as it carries a 10 A current Calculate the electrical conductivityThe manufacturer of a 6 V dry-cell flashlight battery says that the battery will deliver 15 mA for 72 continuous hours. During that time the voltage will drop from 6 V to 4 V. Assume the drop in voltage is linear with time. How much energy does the battery deliver in this 72 h interval? Please answer in typing format solution please.A secondary battery containing Li and Lead acid weighing 60 g that operates continuously through 16 ohms resistance for 300 min .The initial voltage is 3.60 V and the effective voltage over the whole life of the battery is taken to be 1.00.Theoretically, how many miles above the earth could thus battery be raised by the energy delivered under these conditions?
- A 6-V car battery provides a current of 4 A to a load for 8 min. By how much is the chemical energy of the battery decreased during this time?A 12 V lead-acid car battery has a measured voltage of 11.2 V when delivers 40 A to a load. What are the load and the internal battery resistances? Determine its instantaneous power and the rate of sulfuric acid consumptionA constant current of 2 A is required to charge a car battery for 3 hours. The terminal voltage is 12 V. i. How much charge is transported to the battery as the result of charging? ii. How much energy is expanded in Kilo Joule? iii. If the cost of electricity is 15 cents/kWh, how much is the charging cost?