nckaytee said:My teacher posted a practice exam with no answers so I want to make sure I am doing my problems right.
A car battery is rated at 70 A-hrs. How many minutes can this battery last if it operates at a current of 15A?
I made an equation 70A/60min = Xmin/15A
So, X=17.5 min
Am I right?
nckaytee said:so 900 minutes?
An A-hrs calculation is a measurement of the amount of usable energy in a battery or other energy storage device. It takes into account both the voltage and the amount of time the battery can sustain that voltage.
A-hrs calculation is important because it gives an accurate measure of how much energy a battery can provide. This information is crucial for determining the battery's capacity and lifespan, as well as for properly sizing and selecting batteries for different applications.
To calculate A-hrs, you need to multiply the battery's voltage by the amount of time it can sustain that voltage. For example, a 12-volt battery that can sustain its voltage for 5 hours would have an A-hrs calculation of 12 x 5 = 60 A-hrs.
Several factors can affect the accuracy of A-hrs calculation, including temperature, discharge rate, and battery age. It is important to take these factors into account when making A-hrs calculations to ensure the most accurate results.
Yes, A-hrs calculation can be used for any type of battery or energy storage device as long as the voltage and time measurements are accurate. However, different battery chemistries may have different A-hrs ratings, so it is important to consult the manufacturer's specifications for the specific type of battery being used.