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Fyzika

Připojíme-li k ampérmetru o odporu Ra a rozsahu 0 až 12 mA paralelně rezistor o odporu Ra/4, zvětšíme tím horní hranici jeho rozsahu na

Připojíme-li k ampérmetru o odporu R_a a rozsahu 0 až 12 mA paralelně rezistor o odporu R_a/4, zvětšíme tím horní hranici jeho rozsahu na