(9 005? In order to measure the mass of an object, a student found an electromechanical converter. As we all know, the output voltage of the converter is proportional to the compression.

(7) There are two commonly used connections of sliding rheostat: voltage-dividing type and current-limiting type. The voltage-regulating range of voltage-dividing type is one as far as possible. The rheostat is connected by voltage divider, and the circuit diagram is as shown in the figure:

(1) According to the meaning of the question: the output voltage K is directly proportional to the mass of the object, then

K7 = km 1 g, k = km.

So k=k7m 1g, m=m 1k-k7.

(7) The measuring circuit diagram is as shown.

(1) the proportional coefficient k is k7m 1g, and the mass m of the measured object is m 1k-k7.

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