When the length of a wire is doubled, the ammeter reading decreases to one-half. This indicates an inverse relationship between the length of the wire and the current flowing through it.
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When the length of a wire is doubled, the ammeter reading decreases to one-half. This indicates an inverse relationship between the length of the wire and the current flowing through it.
When the length of a wire is doubled in an electrical circuit, the ammeter reading decreases. This is because the resistance of the wire is directly proportional to its length, according to Ohm’s Law (R= ρ L/A). When the length is doubled, the resistance also doubles. Since current (I) is inversely proportional to resistance in Ohm’s Law (I= V/R), the increase in resistance leads to a decrease in the ammeter reading, assuming the voltage remains constant.