Ohm's Law A 120 V lamp-dimming circuit is controlled by a rheostat and protected from excessive current by a 3 A fuse. To what minimum resistance value can the rheostat be set without blowing the fuse? Assume a lamp resistance of 20 ohms. 20 40 4 2 20 40 4 2 ANSWER DOWNLOAD EXAMIANS APP
Ohm's Law What is the approximate filament resistance of a light bulb if it operates from a 110 V source and 0.6 A of current is flowing? 6.6 66 183 18.3 6.6 66 183 18.3 ANSWER DOWNLOAD EXAMIANS APP
Ohm's Law How much voltage is needed to produce 2.5 A of current through a 200 resistor? 8 V 80 V 50 V 500 V 8 V 80 V 50 V 500 V ANSWER DOWNLOAD EXAMIANS APP
Ohm's Law Approximately how much current flows through a 3.3 M resistor across a 30 V source? 900 A 9 A 9000 A 90 A 900 A 9 A 9000 A 90 A ANSWER DOWNLOAD EXAMIANS APP
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 900 mV 18 V 0 V 9 V 900 mV 18 V 0 V ANSWER DOWNLOAD EXAMIANS APP
Ohm's Law A current of 200 µA through a 6.8 k resistor produces a voltage drop of 34.4 V 13.6 V 340 V 1.36 V 34.4 V 13.6 V 340 V 1.36 V ANSWER DOWNLOAD EXAMIANS APP
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