Ohm's Law The current through a flashlight bulb is 40 mA and the total battery voltage is 4.5 V. The resistance of the bulb is approximately 11.2 112 18 1.2 11.2 112 18 1.2 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 18 V 900 mV 0 V 9 V 18 V 900 mV 0 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 8.2 k 820 82 8.2 8.2 k 820 82 ANSWER DOWNLOAD EXAMIANS APP
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. 4 20 2 40 4 20 2 40 ANSWER DOWNLOAD EXAMIANS APP
Ohm's Law Approximately how much current flows through a 3.3 M resistor across a 30 V source? 9000 A 9 A 90 A 900 A 9000 A 9 A 90 A 900 A ANSWER DOWNLOAD EXAMIANS APP
Ohm's Law If you wish to increase the amount of current in a resistor from 120 mA to 160 mA by changing the 24 V source, what should the new voltage setting be? 32 V 8 V 320 V 3.2 V 32 V 8 V 320 V 3.2 V ANSWER DOWNLOAD EXAMIANS APP
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