Final answer:
The power delivered by a battery to apparatus depends on the energy needs and battery voltage. Voltage and energy are related but not the same. As a battery is discharged, its terminal voltage drops due to internal energy usage.
Step-by-step explanation:
The power delivered by a battery to apparatus depends on several factors. Two key considerations that influence the power delivered are the energy needs of the apparatus and the battery voltage. The energy needs refer to the amount of energy required by the apparatus to function properly. The battery voltage, on the other hand, determines the potential difference or electrical pressure that the battery can provide. When these two factors are taken into account, the power delivered by the battery can be calculated using the formula: Power = Energy / Time.
For example, consider a cellular phone that requires 200 Joules of energy to operate and is powered by a battery with a voltage of 3 volts. The power delivered by the battery can be calculated as follows: Power = 200 Joules / Time.
It is important to note that while voltage and energy are related, they are not the same thing. The voltage of a battery indicates its electrical potential, while the energy supplied by the battery is determined by the amount of charge it can move. As a battery is discharged, its energy is used internally, and its terminal voltage drops. This is why the battery ratings in ampere-hours are often interpreted as energy in joules.