一道英语的电学物理题 急A total charge of 5Ah is stored in a 12V battery of a car,Each of the bulbs of the four parking lights is labelled 3.6W/12V .a) Find the current from the battery when only the parking lights are switched on.b) What i

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一道英语的电学物理题 急A total charge of 5Ah is stored in a 12V battery of a car,Each of the bulbs of the four parking lights is labelled 3.6W/12V .a) Find the current from the battery when only the parking lights are switched on.b) What i

一道英语的电学物理题 急A total charge of 5Ah is stored in a 12V battery of a car,Each of the bulbs of the four parking lights is labelled 3.6W/12V .a) Find the current from the battery when only the parking lights are switched on.b) What i
一道英语的电学物理题 急
A total charge of 5Ah is stored in a 12V battery of a car,Each of the bulbs of the four parking lights is labelled 3.6W/12V .
a) Find the current from the battery when only the parking lights are switched on.
b) What is the resistance of one bulb?
c) How long does it take before the battery becomes dead if the parking lights are on?
Assume that internal resistance of the battery and the resistance of the connecting wires are negligible.

一道英语的电学物理题 急A total charge of 5Ah is stored in a 12V battery of a car,Each of the bulbs of the four parking lights is labelled 3.6W/12V .a) Find the current from the battery when only the parking lights are switched on.b) What i
总费用的5Ah储存在一个12伏电池的一辆车,每一组的灯泡的四个停车灯被列为3.6W / 12伏.
一)发现当前的电池只有一个停车灯都打开.
什么是电阻)的灯泡?
c)多久以前的电池成为死在停车灯吗?
假定的密封胶,确保电池和反抗的连接导线是微不足道的.

I=P/U=3.6W/12V=0.3A
R=U^2/P=144/3.6=40Ω
t=W/P=(5*3600)/(4*3.6)=1250s≈21min

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