A constant current of 3 A for 4 hours is required to charge an automotive battery. If the terminal voltage is 10 + t/2 V, where t is in hours, (a) how much charge is transported as a result of the charging? (b) how much energy is expended? (c) how much does the charging cost? Assume electricity costs 9 cents/kWh.
with concentration on part b. Thanks.
A constant current of 3 A for 4 hours is required to charge an automotive battery. If the terminal voltage is 10 + t/2 V...
A constant current of 3 A for 4 hours is required to charge an automotive battery. If the terminal voltage is 10 + t/2 V, where t is in hours, (a) how much charge is transported as a result of the charging? (b) how much energy is expended? (c) how much does the charging cost? Assume electricity costs 9 cents/kWh. with concentration on part b. Thanks.
(a) A car battery with 12 V emf and internal resistance 0.05 is supplying a current of 50 A to the starter motor. Calculate the terminal voltage across its terminals of the motor? At what rate energy is dissipated in the battery? (3 marks) (b) Alisha is afraid of darkness and so sleeps with a 7.5W night light bulb on. She turns it on before getting in bed and tums it off 8 hours later. Determine the annual (365 days)...
The total charge a battery can supply is rated in mA·h, the product of the current and the time that the battery can provide this current. A battery rated at 1000 mA·h can supple a current of 1000 mA for 1.0 h, 500 mA for 2.0 h, and so on. (a) A typical AA rechargeable battery has a voltage of 1.2V and a rating of 1800 mA·h. For how long could this battery drive current through a long, thin wire...
A smartphone battery is capable of delivering a constant current of 2.7A for 16h when fully charged. If the voltage across the terminals of the battery is 6e^(-3.2t)V , where t is in seconds, how much energy is associated with the battery?
A 9.5 V battery supplies a 3.5 mA current to a circuit for 7.0 h . Part A: How much charge has been transferred from the negative to the positive terminal? Part B: How much electric potential energy has been gained by the charges that passed through the battery?
t costs 2.6 cents to charge a car battery at a voltage of 12 Vand a current of 15 A for 120 minutes. Part A What is the cost of electrical energy per kilowatt-hour at this location? Express your answer indollars per kilowatt-hour. Express your answer using two significant figures.
1) A particular 12 V car battery can send a total charge of 84 A h (ampere-hours) through a circuit, from one terminal to the other. (a) How many coulombs of charge does this represent? (Hint: current = ) (b) If this entire charge undergoes a change in electric potential of 12 V, how much energy is involved?
Given: current i(t), energy w(t), charge q(t), voltage v(t), where t represents time. What are the formulas for current and voltage? ALSO Given: current i(t), energy w(t), charge q(t), voltage v(t) and power p(t), where t represents time. What is the formula for power?
A 8.5 V battery supplies a 2.0 mA current to a circuit for 2.9 hr . Part A) How much charge has been transferred from the negative to the positive terminal? Part B) How much work has been done on the charges that passed through the battery?
1.15 The current entering the positive terminal of a device is i(t-6e-21 mA and the voltage across the device is v() 10di/dt V. (a) Find the charge delivered to the device between t0 and t 2s (b) Calculate the power absorbed (c) Determine the energy absorbed in 3 s.