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
Answer: Option A
This Question Belongs to Electrical Engineering >> Ohms Law
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A. 183 Ω
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