Φυσική Γενικής Παιδείας Β' Λυκείου (ΕΠΑΝΑΛΗΨΗ)
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127. 1 ο Γενικό επαναληπτικό 1 ο Θέµα Στις παρακάτω ερωτήσεις 1 έως 5 να επιλέξετε τη µο- ναδική κάθε φορά σωστή απάντηση. 1. Η χαρακτηριστική καµπύλη µιας πηγής φαίνεται στο παρακάτω διάγραµµα: Η ΗΕ∆ και η εσωτερική αντίσταση r της πηγής εί- ναι αντίστοιχα: α. 12V, 6Ω β. 24V, 2Ω γ. 12V, 2Ω δ. 24V, 6Ω (Μονάδες 4) 2. Στο εσωτερικό ενός πυκνωτή µε τάση V = 5 · 10 3 V µεταξύ των οπλισµών του που απέχουν L = 2cm µεταξύ τους, ισορροπεί φορτισµένο σωµατίδιο βάρους Β = 2 10 –3 Ν. Το φορτίο του σωµατιδίου είναι: α. 8nC β. 4 10 –6 C γ. 8µC δ. 8 10 –7 C (Μονάδες 4) 3. Ένα σώµα µάζας m = 50g εκτελεί γραµµική αρµονική ταλάντωση µε εξίσωση y = 0,1ηµ2t. Η ολική ενέργεια της ταλάντωσης είναι: α. 0,5J β. 50J γ. 1J δ. 0,001J (Μονάδες 4) 4. Ευθύγραµµος ρευµατοφόρος αγωγός βρίσκεται µέσα σε οµογενές µαγνητικό πε- δίο. Η δύναµη Laplace που αναπτύσσεται πάνω στον αγωγό: α. έχει τη διεύθυνση των δυναµικών γραµµών. β. είναι µηδέν αν ο αγωγός είναι παράλληλος στις δυναµικές γραµµές. γ. έχει τη διεύθυνση του αγωγού. δ. είναι µηδέν αν ο αγωγός είναι κάθετος στις δυναµικές γραµµές. (Μονάδες 4) 5. Το πείραµα του Oersted απέδειξε ότι: α. γύρω από ρευµατοφόρο αγωγό δηµιουργείται µαγνητικό πεδίο. β. γύρω από ρευµατοφόρο αγωγό δηµιουργείται ηλεκτρικό πεδίο. γ. Η ΗΕ∆ από επαγωγή εξαρτάται από τη µεταβολή της µαγνητικής ροής. 12 6 I(A) V (V) (0,0) ÃåíéêÜ åðáíáëçðôéêÜ
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Transcript of Φυσική Γενικής Παιδείας Β' Λυκείου (ΕΠΑΝΑΛΗΨΗ)
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127.1
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. 12V, 6 . 24V, 2
. 12V, 2 . 24V, 6
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2. V = 5 103V
L = 2cm ,
= 2 103. :
. 8nC . 4 106C
. 8C . 8 107C
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3. m = 50g y = 0,12t.
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. 0,5J . 50J . 1J . 0,001J
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4. -
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5. Oersted :
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6 I(A)
V (V)
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S = 5 103m2 -
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132. 2o
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1R 10= 2R 40= = 153V
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72V/648W. ;
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135.2
EK m,q
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m 100g=
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E 1000N / C= - .
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136. 3o
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2 2S 10 m= R 0,025= . -
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140. 3o
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R = 10.
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Q 30C= C 10F= , :
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