107國中自然3下_2-5
Quiz
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Other
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7th - 9th Grade
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Practice Problem
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Medium
Yu Liu
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
將一條漆包線繞成線圈,再接上一個電阻R和一個檢流計G,如附圖所示;將一磁棒移近線圈,試問如何使檢流計上的指針偏轉角度變大?
增加電阻
增加每單位長度內的線圈的匝數
減緩磁棒移動的速度
換成測量範圍較大的檢流計
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
如芳發現當封閉線圈內的磁場發生變化會產生電流,他想要使此感應電流變大,那麼他可以考慮下列何種作法?
轉動檢流計的指針
增加每單位長度內的線圈圈數
使磁鐵保持靜止於線圈中
改變磁鐵進入線圈的方向
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
根據電磁感應的原理,小平想要利用一個棒形磁鐵和一螺旋形線圈產生電流,那麼他可以考慮下列何種作法?
將線圈靠近或是遠離磁鐵
將線圈連接上一檢流計
將線圈和磁鐵以垂直方向緊緊纏住
將線圈和磁鐵以平行方向緊緊纏住
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
我們的生活中充滿了應用電流和磁場的交互作用所製造的器具,請問以下何種裝置的設計並沒有應用電流和磁場交互作用的原理?
燈泡
馬達
發電機
變壓器
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
利用電磁感應原理所設計出的變壓器,主要是應用哪一項裝置使得輸出端的電壓和輸入端的電壓不同?
輸入可變化的直流電源
輸入可變化的交流電源
輸出端和輸入端纏繞不同圈數的線圈
提供可變的磁場
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
電力公司需透過導線將電能傳輸到各用戶,請問由電力公司所輸出的高壓電是經何種裝置轉換成一般我們所使用的110 V電壓?
發電機
馬達
穩壓器
變壓器
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
胖胖想要自己製造一個簡單的發電機,他到材料行買了線圈、集電環、電刷、轉軸、一轉動線圈的裝置,卻發現無法作用,這是因為他缺少了下列何種材料?
電池
磁鐵
鐵條
彈簧
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