How Does a Calor Engine Power a 200V Generator at Different RPMs?

AI Thread Summary
A calor engine is utilized to power a 200V generator with a current of 4A, and the problem involves determining the engine's RPM. The user has attempted to apply the equation V = NBAw sin(wt) but lacks data for N and B. Suggestions include calculating the work produced by one cycle of the heat engine and determining how many cycles are needed to achieve the required power. Understanding the relationship between power, RPM, and the engine's cycle is essential for solving the problem. The discussion emphasizes the need for additional data to progress in the calculations.
wiraimperia
Messages
9
Reaction score
0

Homework Statement


Hello, let me introduce myself first. I am Wira, a Senior High School alumnus in Indonesia. I am currently preparing for my university entrance exam. This is a problem which I get stuck in, and can you help me with it?
ISOKHOR.PNG

Indonesian:
Suatu mesin kalor yang bekerja dengan siklus yang dibangun dari dua isobar dan dua isokhor seperti pada gambar di atas digunakan untuk menggerakkan sebuah generator yang tegangan keluarannya 200V. Apabila generator ini mendapat beban arus 4A, maka mesin kalor tersebut dijalankan pada putaran per menit...
A 360 rpm
B 400 rpm
C 440 rpm
D 480 rpm
E 520 rpm
English:
A calor engine that works with the cycle of two isobarics and two isochorics shown in the picture above is used to spin a generator that has the output potential of 200V. If this generator has the current of 4A, then that engine is used in ... rpm
(Options above)

Homework Equations


V = NBAw sin (wt)
E = V I t
E = The area of the box area in the graph

The Attempt at a Solution


I have tried using:
V = NBAw sin (wt)
Consider that sin (wt) = 1
But we have no data of N and B...
And for the cycle
Energy generated = the area of the box
Energy = Energy
Consider that t = 1
V I t = NBAw sin (wt)
NBAw I = (Box area)
We are looking for the w, so it becomes
w = (Box area)/NBA
I got stuck in this...
Do you have any ideas? Your contribution helps improve me. =)
 
Physics news on Phys.org
You are given the voltage and current of the generator, so you know its power. (You can assume that the load is ohmic so current and voltage are in phase.)

Calculate the work produced by one cycle of the heat engine. With how many cycles do you get the desired power?

ehild
 

Thread 'Rolling without slipping on a curved surface'

Kindly see the attached pdf. My attempt to solve it, is in it. I'm wondering if my solution is right. My idea is this: At any point of time, the ball may be assumed to be at an incline which is at an angle of θ(kindly see both the pics in the pdf file). The value of θ will continuously change and so will the value of friction. I'm not able to figure out, why my solution is wrong, if it is wrong .
View full post »

Thread 'Struggling to understand the concept of this question (ice cube in water optics question)'

TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
View full post »

Hot Threads

Recent Insights

Back
Top