Ohm's Law 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? 9 V 18 V 0 V 900 mV 9 V 18 V 0 V 900 mV ANSWER DOWNLOAD EXAMIANS APP
Ohm's Law What is the approximate resistance of a rheostat if the voltage source is 18 V and the current is 220 mA? 820 8.2 8.2 k 82 820 8.2 8.2 k 82 ANSWER DOWNLOAD EXAMIANS APP
Ohm's Law The formula to find I when the values of V and R are known is I = V/R I = VR V = IR I = R/V I = V/R I = VR V = IR I = R/V ANSWER DOWNLOAD EXAMIANS APP
Ohm's Law An electric heater draws 3.5 A from a 110 V source. The resistance of the heating element is approximately 3.1 38.5 31 385 3.1 38.5 31 385 ANSWER DOWNLOAD EXAMIANS APP
Ohm's Law How much resistance is needed to draw 17.6 mA from a 12 volt source? 6.8 k 212 68 680 6.8 k 212 68 680 ANSWER DOWNLOAD EXAMIANS APP
Ohm's Law Approximately how many milliamperes of current flow through a circuit with a 40 V source and 6.8 k of resistance? 59 mA 27.2 mA 590 mA 5.9 mA 59 mA 27.2 mA 590 mA 5.9 mA ANSWER DOWNLOAD EXAMIANS APP
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