Question

A 12-VV car battery is rated at 80 ampere-hours, meaning it can supply 80 AA of current for 1 hour before it becomes discharged. Part A If you accidentally leave the headlights on until the battery discharges, how much charge moves through the lights

Answer 1

Answer:

ΔQ = 2.88×10⁵ C

Explanation:

Given that the battery discharges 80A current in 1hr

ΔQ = I ×Δt

Δt = 1hr = 60×60s = 3600s

I = 80A

ΔQ = 80×3600 = 2.88×10⁵ C

Answer 2

Answer:

288000 C

Explanation:

Charge: This is defined as the product of current and time in an electric circuit. The S.I unit of charge is Coulombs (C)

From the question,

The expression for charge is given as

Q = It.................... Equation 1

Where Q = The amount of charge that move through the light, I = current supplied, t = time.

Given: I = 80 A, t = 1 hour = 1×60×60 = 3600 s

Substitute into equation 1

Q = 80(3600)

Q = 288000 C.

Hence the amount of charge that moves from the lights = 288000 C