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. 40 2 20 4 40 2 20 4 ANSWER DOWNLOAD EXAMIANS APP
Ohm's Law How much resistance is needed to draw 17.6 mA from a 12 volt source? 212 680 68 6.8 k 212 680 68 6.8 k ANSWER DOWNLOAD EXAMIANS APP
Ohm's Law How much current is produced by a voltage of 18 kV across a 15 k resistance? 120 mA 12 A 1.2 A 12 mA 120 mA 12 A 1.2 A 12 mA 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? 5.9 mA 590 mA 27.2 mA 59 mA 5.9 mA 590 mA 27.2 mA 59 mA ANSWER DOWNLOAD EXAMIANS APP
Ohm's Law A current of 200 µA through a 6.8 k resistor produces a voltage drop of 1.36 V 340 V 34.4 V 13.6 V 1.36 V 340 V 34.4 V 13.6 V 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? 8.2 k 8.2 82 820 8.2 k 8.2 82 820 ANSWER DOWNLOAD EXAMIANS APP
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