# Ohm’s Laws – 14

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14. You are measuring the current in a circuit that is operated on an 18 V battery. The ammeter reads 40 mA. Later you notice the current has dropped to 20 mA. How much has the voltage changed?

(a) 9 V
(b) 900 mV
(c) 0 V
(d) 18 V

Explanation
Explanation : No answer description available for this question. Let us discuss.
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