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#1 會考物理
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When a nichrome wire of length L and diameter d is connected to a dry cell, the current flowing through the wire is 0.6A. If another nichrome wire of length 3L and diameter 2d is connected to the same cell, what will be the current flowing throuh wire?

A. 0.3A
B. 0.8A
C. 1.2A
D. 1.8A

點計個答案係B?

仲有

A series of 20 light bulbs each has a rating of "11V, 4w" is connected to a 220V power supply. One of the bulbs burns out. Kenneth replaces it with a new bulb, which is ..

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主題:會考物理
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