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זרם חשמלי

כיוונו של זרם חשמלי מפלוס למינוס נכון
האלקטרונים במתחת נעים ממינוס לפלוס
תנאי הכרחי לקיום זרם חשמלי במעגל מעגל סגור
מטען שעובר דרך חתך של תיל ביחידת זמן עוצמת זרם חשמלי
ככל שאורך התייל גדול יותר התנגדותו גדולה יותר
ככל שהטח חתך של התייל גדול יותר התנגדותו קטנה יותר
Created by: bagrut