ورقة مفاهيم physics للصف الثالث الثانوي 2026.. حمل الكتيب pdf الآن

أتاحت وزارة التربية والتعليم والتعليم الفني ورقة مفاهيم physics للصف الثالث الثانوي لمساعدة طلاب شهادة الثانوية العامة بمدارس اللغات في المراجعات النهائية. وتسعى الوزارة من خلال هذا الكتيب المعتمد رسميا إلى تقديم كافة القوانين والمصطلحات الأساسية الخاصة بمادة الفيزياء الديناميكية والكهربائية بشكل دقيق يضمن تكافؤ الفرص لجميع الطلاب.

ورقة مفاهيم فيزياء لغات تالتة ثانوي 2026

تشكل المادة العلمية المدرجة في الأوراق الرسمية مرجعا مكثفا يتضمن القوانين الفيزيائية ومبادئ التيار الكهربي وقوانين كيرشوف وتوصيل المقاومات، مما يسهل على الطلاب استدعاء المعلومات الرياضية والفيزيائية خلال التحضير للامتحانات المدرسية.
وفيما يلي التفريغ الكامل والدقيق لما ورد في أوراق المفاهيم الرسمية المخصصة لطلاب مدارس اللغات:

Unit One: Dynamic electricity and magnetism
Chapter One: electric current and ohm's law and Kirchhoff's laws

Concepts
1- The electric current is the amount of charge flowing through a conductor.
2- Electric current intensity (I) is the amount of electric charges flowing through a given section of a conductor in a time of 1 s.
3- The potential difference between two points (V) is the work done in joules to transfer a unit of electric charge (1coulomb) from one point to another.
4- The electromotive force of a source (VB) is the total work done required to transfer a unit charge (1coulomb) through the whole circuit (outside and inside the source) and has the same measuring unit of potential difference (volt).
5- The electric resistance (R) is the opposition of the conductor to flow the electric current, it depends at constant temperature on the length of the conductor , its cross-sectional area and the type of its material
6- The specific resistance of the material (the electric resistivity) (ρe): (It is the resistance of a conductor of length 1m and of cross sectional area 1m² at constant temperature). It depends on the temperature and the type of conductor material.
7- The electric conductivity of a material (σ) (is the reciprocal of the specific resistance), it depends on the temperature and the type of conductor material
8- Ohm's Law:(The current intensity flowing through a conductor is directly proportional to the potential difference across its ends at constant temperature)
9- Ohm's Law for closed circuit (the electric current intensity in a closed circuit is the emf of the total source divided by the total resistance of the circuit.
10- The relation between the electromotive force of a cell (VB) and the potential difference between its poles (V)

(The electromotive force of a cell is the voltage difference across the cell (source) when the current vanishes to flow in the circuit).
[Graph 1: An electric circuit containing a cell (VB, r), a switch, a voltmeter connected across the cell, an ammeter, and a rheostat]
[Graph 2: A straight line graph showing a negative slope between V on the vertical axis and I on the horizontal axis]
(Slope) = - r
11- Kirchhoff's laws
1- (At any node (junction) in an electrical circuit, the sum of currents flowing into the node is equal to the sum of currents flowing out of that node)(based on conservation of electric charge)
Σ I in = Σ I out   (KCL)
2- (The algebraic sum of the electromotive forces in any closed loop is equivalent to the algebraic sum of potential differences within that loop) (based on conservation of energy)
Σ VB = Σ I R   (KVL)
12- Connection of resistors:
Series connection:
1- [Circuit diagram showing three resistors R1, R2, R3 connected in series with voltmeters V1, V2, V3 across each respectively, and a total voltage V from a battery]
2- The current through all the resistors is the same: I = I1 = I2 = I3
3- The total potential difference between the two ends of the group is equal to the sum of the potential differences on the resistors in the circuit: V = V1 + V2 + V3
4- The equivalent resistance R' of a group of resistors connected in series is equal to the sum of these resistors:
R' = R1 + R2 + R3
If there are (N) equal resistances connected in series each equal to (R):
R' = N R
Parallel connection:
1- [Circuit diagram showing three resistors R1, R2, R3 connected in parallel branches with currents i1, i2, i3 and a total current i flowing from a battery]
2- The total current flowing through the circuit is equal to the sum of the currents passing through each individual resistance: I = I1 + I2 + I3
3- The potential difference through all the resistors is the same: V = V1 = V2 = V3
4- The reciprocals of equivalent resistance R' of a group of resistors connected in parallel is equal to the sum of the reciprocals of these resistors:
1 / R' = 1 / R1 + 1 / R2 + 1 / R3
If there are (N) equal resistances connected in parallel each equal to (R):
R' = R / N
For two resistors:
R' = (R1 . R2) / (R1 + R2)