How will the reading of ammeter change if the key k is closed?
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Answer: I increases.
Explanation:
If the switch is closed (right), there is cuLets assume, If trrent in R2. What happens to the reading on the ammeter when the switch is closed? When the switch is closed, resistors R1 and R2 are in parallel, so that the total circuit resistance is smaller than when the switch was open. As a result, the current increases.
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