0
Actually, the 12 and sometimes 24 volts used in car operation is not very high at all (Your wall probably gives you 112 volts). I think what you're actually asking about is why is the current so large. The answer lies in the transfer of power which is related to current through p=i2 *r where r is the resistance, but also equal to p = i*v which means that the current and voltage (which is called potential) are inversely related. Since the relationship of power to potential is p = v2/r, for a given amount of power available in a battery, more will be able to be used if the current is what dominates. And so, we have cars with 12v (sometimes 24) and 45 or even 90 amp.s (an amp. is the measure of current).
If what you're getting at is why is the power supplied by the battery so large, it's only actual use is to turn the starter motor (which is cranking the entire engine from cold to running), after that, the engine could be self sustaining as long as their is a connection there.
But I wrote a little off topic there. The primary reason why electric cars and power lines have high voltage and low current (again they are inversely proportional) until right before use is that power loss over a length of wire is proportional to the square of the current, but only linear with respect to the potential (ploss = i2*v).
Wiki User
∙ 9y ago
Add your answer:
Earn +20 pts
What is voltages of car battery?
12 volt
Is a car electric?
In some fashion, yes. There are very few cars which are entirely electric - most still use internal combustion engines. However, the function and operation of a car is also largely dependent on the electrical system just as it is on the engine. So, even a car with an internal combustion engine won't operate without electrical power.
What is the difference between a smart car and an electric car?
A Smart car can have an internal combustion engine. An electric car is....electric
What is electric car in German?
electric car = elektrisches Auto
Is the Prius C a hybrid or electric car?
electric car
What is an eletric car?
A electric car is a car that only uses electric instead of gas.
Where can I charge my electric car when traveling?
In Ontario, Quebec and New Brunswick they have opened new car electric power systems. In Ontario you can recharge your car with low costs and high efficiency. In Quebec and New Brunswick, It's the same. So charge up your car and continue to drive.
What is the average speed of an electric car?
What is the average speed of an electric car?
What is a hybrid car compared to an electric car?
A hybrid car runs on less fuel economically its efficent and costs you less in the long run. It has high miles per gallon. An electric car is recharged daily through such means as a powersupply. These are still in production and arnt very officent for milage.
Were did they make this first electric car?
They made the first electric car in London
When was Owning an Electric Car created?
Owning an Electric Car was created in 2010.
Where was the first electric car made?
The electric car was first made in England.
