PHYSICS HIGH SCHOOL

A car battery with a 12 V emf and an internal resistance of 0.11 Ω is being charged with a current of 56 A. What are (a) the potential difference across the terminals, (b) the rate Pr of energy dissipation inside the battery and (c) the rate Pemf of energy conversion to chemical form? When the battery is used to supply 56 A to the starter motor, what are (d) V and (e) Pr

Answers

Answer 1

Answer:

Answer:

Part a)

V = 18.16 V

Part b)

$P_r = 345 Watt$

Part c)

P = 672 Watt

Part d)

V = 5.84 V

Part e)

$P_r = 345 Watt$

Explanation:

Part a)

When battery is in charging mode

then the potential difference at the terminal of the cell is more than its EMF and it is given as

$\Delta V = E + i r$

here we have

$E = 12 V$

$i = 56 A$

$r = 0.11$

now we have

$\Delta V = 12 + (0.11)(56) = 18.16 V$

Part b)

Rate of energy dissipation inside the battery is the energy across internal resistance

so it is given as

$P_r = i^2 r$

$P_r = 56^2 (0.11)$

$P_r = 345 W$

Part c)

Rate of energy conversion into EMF is given as

$P_(emf) = i E$

$P_(emf) = (56)(12)$

$P_(emf) = 672 Watt$

Now battery is giving current to other circuit so now it is discharging

now we have

Part d)

$V = E - i r$

$V = 12 - (56)(0.11)$

$V = 12 - 6.16 = 5.84 V$

Part e)

now the rate of energy dissipation is given as

$P_r = i^2 r$

$P_r = 56^2 (0.11)$

$P_r = 345 W$

Related Questions

Classical physics is a good approximation to modern physics under certain circumstances. What are they?
A ray of monochromatic light (f=5.09x10^14 hz) passes through air and a rectangular transparent block calculate the absolute index of refraction for the medium of the transparent block Angle of incidence of the light ray as it enters the transparent block from air =40 degrees The angle of refraction of the light ray as it enters the transparent block from air = 20 degrees Calculate the absolute index of refraction from the medium of the transparent block
Momentum is a measure of ____.a. how hard it is to stop an object b. the amount of matter in an object c. the tendency of an object to change its motion d. the amount of force acting on an object
When is acceleration the greatest on a graph
a child riding a bicycle at 15 m/s decelerate at the rate of 3.0 meters per second squared for 4.0 seconds. what is the child's speed at the end of the 4.0 seconds?

Which best compares a brush and a commutator in an electric motor?

Answers

The purpose of the brush is supposed to be to lessen the amount of damage or wear placed upon the motor. I hope this helps with your answer choices since you did not post any.

Sebuah bis bergerak dengan kecepatan 120 meter perdetik selama 10 menit hitunglah jarak yang ditempuh oleh bis tersebut