Car batteries are often rated in units of amperes-hours (A h). Does this informa
ID: 1543087 • Letter: C
Question
Car batteries are often rated in units of amperes-hours (A h). Does this information designate the amount of (a) current, (b) power, (c) energy, (d) charge, or (c) potential difference the battery can supply? Show how an appropriate unit for the quantity can be determined from the given units. the electric company sells an electric quantity measured in units of kilowatt-hours (kW h). What does the electric company sell? Does it sell (a) current, (b) power, (c) energy, (d) charge, or (c) potential diplococcic? Show how an appropriate unit for the quantity can be determined from the given units.Explanation / Answer
A-h denotes the unit of charge .
Charge = Current x time
since "A" is unit of current and "h" is unit of time
hence product Ah represents charge
1 Ah = 1 A (3600 sec) = 3600 A-sec
we know that A-sec = Coloumb
hence
1 Ah = 3600 C
KWh is the unit of electric energy .
Energy = power x time
kilowatt(KW) is the unit of power and "h" is the unit of time
1 kWh = 1000 Watt x 3600 sex = 3.6 x 106 W-s
we know that : W-s = Joules
hence
1 kWh = 3.6 x 106 J