It depends on the state of charge. A fully charged lead-acid 12V battery will measure around 13.6V, the same battery at the end of useful charge will be approximately 10.5V
its 12 v
Usually one that can maintain the voltage at 12 V so that it can safely charge a 12 V battery.
15.5 volts
from 13 to 15 V approx
1,5 v
A battery has a voltage and can supply a certain current for a period of time. You could have a 12 V battery that can deliver 100 A of cranking current or one good for supplying 100 A for an hour.
Yes, but they will not be as bright as they would be with the correct voltage.
The power used by the car battery can be calculated using the formula P = V x I, where P is power, V is voltage, and I is current. Plugging in the values, we get P = 12 V x 0.5 A = 6 watts. Therefore, a 12V car battery that draws 0.5A of current uses 6 watts of power.
If you're using the same input voltage, as the battery charger was designed for, then a simple socket adapter will make absolutely no difference to it's function. On the other hand, using a different input voltage to that which the battery charger was designed for, will make a considerable difference to the output voltage and current. Hence a 120 V automotive battery charger, if plugged into a 220 V socket will deliver nearly 24 V to a battery instead of 12 V, although the current supplied will be half it's normal value.
the voltage of a battery could be larger than the emf if you are to charge the battery, in that case V=E+Ir .
The energy stored in a battery can be calculated using the formula ( E = V \times Q ), where ( E ) is energy in joules, ( V ) is voltage in volts, and ( Q ) is charge in coulombs. For a 6 V battery storing 12 coulombs of charge, the energy would be ( E = 6 , \text{V} \times 12 , \text{C} = 72 , \text{J} ). Therefore, the battery stores 72 joules of energy.
The voltage of a typical lawn mower battery is usually 12 volts.