The document discusses some basic rules and concepts of electrical circuits:
1. Branches are parts of a circuit with the same current flowing through them. Nodes are points where two or more branches meet.
2. Kirchhoff's laws state that the sum of currents entering a node equals the sum of currents leaving it, and that the algebraic sum of the voltage drops around any closed loop is equal to zero.
3. Resistances in series have the same current flowing through them, and the total resistance is equal to the sum of the individual resistances. The voltage drops across each resistance is proportional to its resistance value.
This document provides an overview of the key topics covered in an introductory electrical engineering course. These include electrical charge, current and current intensity, voltage, direct current circuits and their analysis, electrical energy and power, magnetism and electromagnetism and magnetic fields, electromagnetic induction, capacitors, and alternating current. The document also provides some brief historical context on the development of these concepts from 1800-1890 and defines common units like the coulomb for measuring electrical charge.
The document discusses some basic rules and concepts of electrical circuits:
1. Branches are parts of a circuit with the same current flowing through them. Nodes are points where two or more branches meet.
2. Kirchhoff's laws state that the sum of currents entering a node equals the sum of currents leaving it, and that the algebraic sum of the voltage drops around any closed loop is equal to zero.
3. Resistances in series have the same current flowing through them, and the total resistance is equal to the sum of the individual resistances. The voltage drops across each resistance is proportional to its resistance value.
This document provides an overview of the key topics covered in an introductory electrical engineering course. These include electrical charge, current and current intensity, voltage, direct current circuits and their analysis, electrical energy and power, magnetism and electromagnetism and magnetic fields, electromagnetic induction, capacitors, and alternating current. The document also provides some brief historical context on the development of these concepts from 1800-1890 and defines common units like the coulomb for measuring electrical charge.
1. 9ο Γυμνάσιο Ιωαννίνων 1
τι είναι τα
έξοδα και
τα έσοδα;
ποιος είναι ο
σκοπός μιας
παραγωγικής
μονάδας;
2. Έσοδα – έξοδα μιας παραγωγικής μονάδας
έσοδα
• από την τιμή και την ποσότητα των
προϊόντων που πουλάει μια παραγωγική
μονάδα
έξοδα (κόστος)
• τα χρήματα που δαπανά μια παραγωγική
μονάδα για να παράγει τα προϊόντα της
(αμοιβές προσωπικού, αγορά πρώτων υλών,
κόστος μηχανημάτων και ενέργειας κλπ)
29ο Γυμνάσιο Ιωαννίνων
4. Σκοπός μιας παραγωγικής μονάδας
σκοπός παραγωγικής μονάδας:
Να μεγιστοποιήσει το κέρδος. Δηλαδή: να πουλήσει
όσο το δυνατόν περισσότερα προϊόντα σε όσο το
δυνατόν μεγαλύτερης τιμές (έσοδα) και να
δαπανήσει όσο το δυνατόν λιγότερα χρήματα για την
παραγωγή τους (έξοδα)
49ο Γυμνάσιο Ιωαννίνων
5. Έ
σ
ο
δ
α
Έ
ξ
ο
δ
α
παραγωγή νέων προϊόντων και ανάπτυξη
τεχνογνωσίας,
είσοδος σε νέες αγορές,
διαφήμιση και προώθηση προϊόντων
εισαγωγή νέων τεχνολογιών κλπ
Σκοπός μιας παραγωγικής μονάδας
μείωση του κόστους παραγωγής (π.χ. σύγχρονος
εξοπλισμός),
μισθοί προσωπικού,
αγορά πιο φθηνών πρώτων υλών κλπ
59ο Γυμνάσιο. Ιωαννίνων