What is vtv5 trực tiếp bóng đá hôm nay Joule-Lenz law? What is vtv5 trực tiếp bóng đá hôm nay formula of vtv5 trực tiếp bóng đá hôm nay Joule-Lenz law? What are vtv5 trực tiếp bóng đá hôm nay 2 educational objectives of grade 10 Physics in Vietnam?
What is vtv5 trực tiếp bóng đá hôm nay Joule-Lenz law? What is vtv5 trực tiếp bóng đá hôm nay formula of vtv5 trực tiếp bóng đá hôm nay Joule-Lenz law?
Joule's Law of Heating, often referred to as Joule-Lenz Law, is one of vtv5 trực tiếp bóng đá hôm nay significant laws in electrical physics, with numerous practical applications in everyday life. Understanding this law helps us use electrical energy more safely and efficiently.
Grade 10 students can refer to vtv5 trực tiếp bóng đá hôm nay explanation of Joule-Lenz law and its formula below:
What is vtv5 trực tiếp bóng đá hôm nay Joule-Lenz law? What is vtv5 trực tiếp bóng đá hôm nay formula of vtv5 trực tiếp bóng đá hôm nay Joule-Lenz law?
Joule-Lenz Law describes vtv5 trực tiếp bóng đá hôm nay relationship between vtv5 trực tiếp bóng đá hôm nay heat emitted from a conductor when an electric current passes through it, vtv5 trực tiếp bóng đá hôm nay current's intensity, vtv5 trực tiếp bóng đá hôm nay conductor's resistance, and vtv5 trực tiếp bóng đá hôm nay duration vtv5 trực tiếp bóng đá hôm nay current passes through.
*Statement:
vtv5 trực tiếp bóng đá hôm nay heat emitted in a conductor when an electric current passes through is proportional to vtv5 trực tiếp bóng đá hôm nay square of vtv5 trực tiếp bóng đá hôm nay current's intensity, vtv5 trực tiếp bóng đá hôm nay resistance of vtv5 trực tiếp bóng đá hôm nay conductor, and vtv5 trực tiếp bóng đá hôm nay time vtv5 trực tiếp bóng đá hôm nay current passes through.
*Formula:
Q = I²Rt
*Where:
Q: Heat emitted (Joule, J)
I: Electric current intensity (Ampere, A)
R: Resistance of vtv5 trực tiếp bóng đá hôm nay conductor (Ohm, Ω)
t: Time vtv5 trực tiếp bóng đá hôm nay current passes through (seconds, s)
*Significance of vtv5 trực tiếp bóng đá hôm nay formula:
I²: Indicates that vtv5 trực tiếp bóng đá hôm nay heat emitted increases significantly as vtv5 trực tiếp bóng đá hôm nay current intensity increases.
R: vtv5 trực tiếp bóng đá hôm nay greater vtv5 trực tiếp bóng đá hôm nay resistance, vtv5 trực tiếp bóng đá hôm nay more heat is emitted.
t: vtv5 trực tiếp bóng đá hôm nay longer vtv5 trực tiếp bóng đá hôm nay current passes through, vtv5 trực tiếp bóng đá hôm nay more heat is emitted.
*Applications:
- Calculating emitted heat: This formula helps calculate vtv5 trực tiếp bóng đá hôm nay amount of heat emitted from a specific conductor when vtv5 trực tiếp bóng đá hôm nay current and resistance parameters are known.
- Designing electrical devices: This formula is used to design electrical devices so that vtv5 trực tiếp bóng đá hôm nay heat emitted is not excessive, preventing fires and explosions.
- Explaining thermal phenomena in electrical circuits: This formula helps explain why electrical devices like bulbs heat up when an electric current passes through them.
*Example:
A bulb with a resistance of 200Ω is connected to a 220V power source for 10 minutes. Calculate vtv5 trực tiếp bóng đá hôm nay heat emitted from vtv5 trực tiếp bóng đá hôm nay bulb.
Solution:
Electric current through vtv5 trực tiếp bóng đá hôm nay bulb: I = U/R = 220/200 = 1.1A
Time: t = 10 minutes = 600 seconds
Emitted heat: Q = I²Rt = 1.1² * 200 * 600 = 145200 J
*Note: Informationis for reference only.
What is vtv5 trực tiếp bóng đá hôm nay Joule-Lenz law? What is vtv5 trực tiếp bóng đá hôm nay formula of vtv5 trực tiếp bóng đá hôm nay Joule-Lenz law? What are vtv5 trực tiếp bóng đá hôm nay 2 educational objectives of grade 10 Physics in Vietnam? (Image from vtv5 trực tiếp bóng đá hôm nay Internet)
What are vtv5 trực tiếp bóng đá hôm nay 2 educational objectives of grade 10 Physics in Vietnam?
According to vtv5 trực tiếp bóng đá hôm nay provisions in Section 3 of vtv5 trực tiếp bóng đá hôm nay General Education Program in Physics, promulgated together withCircular 32/2018/TT-BGDDT, vtv5 trực tiếp bóng đá hôm nay educational objectives forPhysics at upper secondary level are as follows:
[1]Along with other subjects and educational activities, help students form and develop key qualities and general competencies as specified in vtv5 trực tiếp bóng đá hôm nay overall program.
[2]Help students form and develop physics competencies, with manifestations including:
+ Acquiring core general knowledge and skills regarding: physical system models; energy and waves; forces and fields;
+ Applying some scientific process skills to explore and solve problems from a physics perspective;
+ Applying some knowledge and skills in practice, interacting with nature in harmony with vtv5 trực tiếp bóng đá hôm nay requirements of sustainable social development and environmental protection;
+ Recognizing personal abilities, talents, orienting career paths, and making study and practice plans that align with career orientation requirements.
What are regulations on assessment of vtv5 trực tiếp bóng đá hôm nay educational outcome of grade 10 Physics in Vietnam?
Based on Section 7 of vtv5 trực tiếp bóng đá hôm nay General Education Program in Physics, promulgated together withCircular 32/2018/TT-BGDDT, vtv5 trực tiếp bóng đá hôm nay assessment criteria for vtv5 trực tiếp bóng đá hôm nay educational outcome of grade 10 Physics in Vietnamare as follows:
(1) General orientation
- vtv5 trực tiếp bóng đá hôm nay objective of educational outcome assessment is to collect honest, timely, and valuable information about vtv5 trực tiếp bóng đá hôm nay extent to which students meet required outcomes and their progress. Through this, guide learning activities and adjust teaching activities.
- vtv5 trực tiếp bóng đá hôm nay assessment foundation in Physics is vtv5 trực tiếp bóng đá hôm nay required outcomes for general and physics competencies specified in vtv5 trực tiếp bóng đá hôm nay overall program and vtv5 trực tiếp bóng đá hôm nay Physics program. vtv5 trực tiếp bóng đá hôm nay assessment targets are vtv5 trực tiếp bóng đá hôm nay learning process, practice, and student products through learning Physics.
- To assess students' competencies, it is essential to design situations that present problems requiring resolution, helping students showcase their capabilities. Moreover, it is crucial to identify and select appropriate methods, tools, and assessment criteria.
(2) Focus and assessment methods
- vtv5 trực tiếp bóng đá hôm nay focus of learning outcome assessment in Physics is on problem recognition, problem-solving abilities, and practical and experimental skills, specifically core understanding of:
+ Physical system models, energy and waves, forces and fields, physics-related careers;
+ Experimental skills, practical skills, science exploration, application of learned knowledge to explain simple physical phenomena, initially solve some practical problems, and appropriate interaction with vtv5 trực tiếp bóng đá hôm nay natural environment.
- Reasonable coordination of teacher assessments with peer assessments and student self-assessments;
- Assessment through observing group activities in and outside vtv5 trực tiếp bóng đá hôm nay classroom, observing practical and experimental manipulations, and analyzing presentations;
- Assessment through oral exams, written exercises, tests, notebooks, practice reports, project outcomes, research topics, and other learning records;
- Assessment through a combination of essay writing and multiple-choice tests, process evaluation, summative evaluation, and regular periodic evaluations.
