tag:blogger.com,1999:blog-1209186394192032932024-08-29T05:05:08.523-07:00مدونة الفيزياء - عمر سامينشر مواد تعليمية تخص مادة الفيزياء للصفوف العاشر والحادي عشر والثاني عشرUnknownnoreply@blogger.comBlogger23125tag:blogger.com,1999:blog-120918639419203293.post-77337985002634548372019-03-01T04:20:00.004-08:002019-03-01T04:20:48.391-08:00أسئلة إضافية محلولة على المحث الكهرومغناطيسي<div dir="ltr" style="text-align: left;" trbidi="on">
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Unknownnoreply@blogger.comtag:blogger.com,1999:blog-120918639419203293.post-9591509628848952092019-03-01T04:16:00.002-08:002019-03-01T04:16:32.070-08:00برنامج امتحانات الشهرين الموحد توجيهي - الفصل الثاني محافظة رام الله والبيرة<div dir="ltr" style="text-align: left;" trbidi="on">
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Unknownnoreply@blogger.comtag:blogger.com,1999:blog-120918639419203293.post-82190600071914182042019-03-01T04:14:00.001-08:002019-03-01T04:14:58.288-08:00الطاقة المختزنة في محث<div dir="ltr" style="text-align: left;" trbidi="on">
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Unknownnoreply@blogger.comtag:blogger.com,1999:blog-120918639419203293.post-33192721334320895882019-03-01T04:12:00.003-08:002019-03-01T04:12:56.989-08:00إجابات الاسئلة الداخلية للمجال الكهربائي<div dir="ltr" style="text-align: left;" trbidi="on">
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Unknownnoreply@blogger.comtag:blogger.com,1999:blog-120918639419203293.post-58120915259989604812019-03-01T04:11:00.005-08:002019-03-01T04:11:51.512-08:00إجابات الاسئلة الداخلية في الحرارة في حياتنا<div dir="ltr" style="text-align: left;" trbidi="on">
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Unknownnoreply@blogger.comtag:blogger.com,1999:blog-120918639419203293.post-81606588406105819332019-02-24T12:15:00.004-08:002019-02-24T12:15:52.213-08:00الشحنة الكهربائية وقانون كولوم<div dir="ltr" style="text-align: left;" trbidi="on">
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Unknownnoreply@blogger.comtag:blogger.com,1999:blog-120918639419203293.post-58098963274129649142019-02-24T11:59:00.001-08:002019-02-24T11:59:24.214-08:00مفهوم مبسط للكهرباء السكونية<div dir="ltr" style="text-align: left;" trbidi="on">
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عندما نقوم بنزع الملابس الصوفية في أيام الشتاء فإننا نسمع صوت فرقعات وفي بعض الحالات نشاهد ومضة كهربائية، أو عندما نلامس بعض الأشخاص أو عندما نمسك يد الباب نشعر بصدمة كهربائية، فقد أدركت العديد من الحضارات القديمة وجود شحنات مسؤولة عن ظواهر الكهرباء المختلفة، فلاحظ الفيلسوف طاليس أنّه عند دلك قطعة من الكهرمان بقطعة من القماش فإنّ الريش والخيوط الصوفية أو القطنية تنجذب لها، كما كان العالم الإنجليزي وليم جلبرت من أوائل العلماء الذين درسوا الظواهر الكهربائية ووجد أنّ هنالك قوة جذب مجهولة بين الأجسام المشحونة، وبعد قيام العالم بنجامين فرانكلين بالعديد من التجارب وجد أنّ هنالك شحنات كهربائية موجبة وسالبة بينما العالم الإنجليزي ستيفن غراي وجد من خلال قيامه بالعديد من التجارب أن هنالك مواد موصلة لشحنات ومواد عازلة، من خلال هذا المقال سوف نتعرف على مفهوم الشحنة وخصائصها، وسوف نتعرف على مفهوم قانون كولوم وعلى ماذا يعتمد. مفهوم الشحنة الشحنة الكهربائية عبارة عن خاصية فيزيائية للمادة وهي تنشأ بسبب فقدان أو اكتساب الأجسام للإلكترونات، حيث تتكون المادة من ذرات وتكون الذرات في الحالة الطبيعية متعادلة الشحنة وذلك لأنّ عدد البروتونات الموجبة فيها تساوي عدد الإلكترونات السالبة، فعند اكتساب الجسم للإلكترونات فإنّ عدد الشحنات السالبة تزداد وبالتالي تصبح شحنة الجسم سالبة، أمّا عند فقدان الجسم للإلكترونات فإنّ عدد الشحنات الموجبة (البروتونات تزداد) وبالتالي تصبح شحنة الجسم موجبة، وتقاس الشحنة الكهربائية بوحدة الكولوم وذلك تقديراً لجهود العالم كولوم الذي ساهم بشكل كبير في إيجاد العلاقة بين الشحنات الكهربائية. خصائص الشحنات الكهربائية تقسم الشحنات الكهربائية إلى ثلاثة أنواع فهنالك شحنات موجبة مثل البروتونات، وشحنات سالبة مثل: الإلكترونات، وشحنات متعادلة مثل الفوتونات، والنيوترونات. الشحنة مكمّاة: المقصود بها أنّ شحنة أي جسم أو جسيم في الطبيعة تكون من مضاعفات شحنة الإلكترون، فلا يوجد جسيم أو جسم مشحون بربع شحنة الإلكترون أو نصف شحنة الإلكترون إنما تكون من مضاعفات شحنة الإلكترون أي أن: شحنة الجسم أو الجسيم = عدد صحيح × شحنة الإلكترون. الشحنة محفوظة: المقصود بحفظ الشحنة أنّ الشحنة لا تفنى ولا تستحدث إنما تنتقل من مكان إلى آخر وتتغيّر من شكل إلى آخر أي لا تأتي من العدم ولا تذهب إلى العدم. قانون كولوم ابتكر العالم شارل كولوم جهازاً يسمّى الميزان الليّ، وذلك لدراسة الشحنات بشكل تجريبي وإيجاد قانون علمي يربط بين الشحنات الكهربائية، بعد إثبات أنّ هناك قوى تجاذب وتنافر تحدث بين الشحنات وجد العالم كولوم أن هنالك قوى متبادلة بين الشحنات الكهربائية تسمى بالقوّة الكهربائية، حيث من خلال العديد من التجارب التي قام بها العالم كولوم وجد أنّ القوة المتبادلة بين شحنتين لها الخصائص التالي: تتناسب القوة المتبادلة طردياً مع مقدار الشحنات المتجاذبة أو المتنافرة. تتناسب القوة المتبادلة عكسياً مع مربع المسافة بين الشحنات. تكون هذه القوة المتبادلة بين الشحنتين إما قوة تجاذب أو قوة تنافر. فمن خلال هذه الخصائص نستطيع تعريف قانون كولوم هو عبارة عن قانون لإيجاد القوة المتبادلة بين شحنتين بينهما مسافة معينة وتقاس بوحدة النيوتن القوة المتبادلة = ثابت × ( ش1 × ش2) / مربع المسافة. F=K.q1.q2/r2</div>
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Unknownnoreply@blogger.comtag:blogger.com,1999:blog-120918639419203293.post-36105872789204016292019-02-18T06:26:00.000-08:002019-02-24T12:18:12.692-08:00قوة لورنتز - مادة اثرائية<div dir="ltr" style="text-align: left;" trbidi="on">
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Unknownnoreply@blogger.comtag:blogger.com,1999:blog-120918639419203293.post-17106144577313886592019-02-18T06:23:00.002-08:002019-02-18T06:23:29.263-08:00اسئلة على الموائع السكونيه<div dir="ltr" style="text-align: left;" trbidi="on">
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Unknownnoreply@blogger.comtag:blogger.com,1999:blog-120918639419203293.post-40708647611362097792019-02-18T06:21:00.000-08:002019-02-24T12:19:34.720-08:00الموائع السكونية<div dir="ltr" style="text-align: left;" trbidi="on">
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Unknownnoreply@blogger.comtag:blogger.com,1999:blog-120918639419203293.post-86291679605322238702019-02-18T06:17:00.000-08:002019-02-24T12:19:45.550-08:00تلخيص الضوء<div dir="ltr" style="text-align: left;" trbidi="on">
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Unknownnoreply@blogger.comtag:blogger.com,1999:blog-120918639419203293.post-42059042983418075692019-02-18T06:14:00.000-08:002019-02-24T12:20:03.915-08:00تلخيص الشحنة الكهربائية<div dir="ltr" style="text-align: left;" trbidi="on">
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Unknownnoreply@blogger.comtag:blogger.com,1999:blog-120918639419203293.post-47758014943083985502019-02-18T06:05:00.000-08:002019-02-24T12:20:20.120-08:00اسئلة محلولة على القوة الدافعة الحثية<div dir="ltr" style="text-align: left;" trbidi="on">
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Unknownnoreply@blogger.comtag:blogger.com,1999:blog-120918639419203293.post-8263816567913524082019-02-18T06:01:00.001-08:002019-02-24T12:20:38.120-08:00امتحان في القوة المغناطيسية والمجال المغناطيسي<div dir="ltr" style="text-align: left;" trbidi="on">
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Unknownnoreply@blogger.comtag:blogger.com,1999:blog-120918639419203293.post-45976609732079715932019-02-18T05:57:00.002-08:002019-02-18T05:58:00.048-08:00امتحان في الحركة الدورانية || الصف الحادي عشر<div dir="ltr" style="text-align: left;" trbidi="on">
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Unknownnoreply@blogger.comtag:blogger.com,1999:blog-120918639419203293.post-71728758651471856672019-02-18T05:52:00.006-08:002019-02-18T05:55:22.305-08:00الضوء - حلول أناقش + حلول الأسئلة في الكتاب المدرسي || الصف الحادي عشر<div dir="ltr" style="text-align: left;" trbidi="on">
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Unknownnoreply@blogger.comtag:blogger.com,1999:blog-120918639419203293.post-29323098417623452662019-02-18T05:48:00.003-08:002019-02-18T06:28:35.963-08:00اسئلة محلولة على قانون فارادي وقاعدة لنز || التوجيهي<div dir="ltr" style="text-align: left;" trbidi="on">
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Unknownnoreply@blogger.comtag:blogger.com,1999:blog-120918639419203293.post-33775019657509986312019-02-18T05:44:00.003-08:002019-02-18T05:45:27.263-08:00حلول اسئلة الشحنة الكهربائية و قانون كولوم || الصف الحادي عشر<div dir="ltr" style="text-align: left;" trbidi="on">
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Unknownnoreply@blogger.comtag:blogger.com,1999:blog-120918639419203293.post-53166578211081448672019-02-18T05:40:00.002-08:002019-02-18T05:41:34.029-08:00حلول اسئلة الموائع السكونية || الصف العاشر<div dir="ltr" style="text-align: left;" trbidi="on">
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<blockquote class="tr_bq">
ملاحظة : السؤال الخامس - يعوض الرقم 0.175 عوضاً عن 1.75 ويكون الجواب 1400 باسكال عوضاً عن 14000</blockquote>
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Unknownnoreply@blogger.comtag:blogger.com,1999:blog-120918639419203293.post-83521976633175226212019-02-16T02:43:00.000-08:002019-02-18T06:27:22.279-08:00قاعدة لنز || التوجيهي<div dir="ltr" style="text-align: left;" trbidi="on">
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Unknownnoreply@blogger.comtag:blogger.com,1999:blog-120918639419203293.post-56313818983366770412019-02-16T02:41:00.000-08:002019-02-16T02:41:28.768-08:00حلول اسئلة الحركة التوافقيه البسيطه || فيزياء 11 علمي<div dir="ltr" style="text-align: left;" trbidi="on">
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Unknownnoreply@blogger.comtag:blogger.com,1999:blog-120918639419203293.post-79906966465958806092019-02-16T02:34:00.002-08:002019-02-16T07:05:17.144-08:00جهاز الهيدروميتر لقياس كثافة السوائل || الصف العاشر<div dir="ltr" style="text-align: left;" trbidi="on">
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Unknownnoreply@blogger.comtag:blogger.com,1999:blog-120918639419203293.post-8780440124204249602019-02-16T02:32:00.002-08:002019-02-18T06:01:55.664-08:00امتحان في المجال والقوة المغناطيسية مع الحلول || التوجيهي<div dir="ltr" style="text-align: left;" trbidi="on">
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