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? 18 V 9 V 0 V 900 mV 18 V 9 V 0 V 900 mV ANSWER DOWNLOAD EXAMIANS APP
Ohm's Law Twelve volts are applied across a resistor. A current of 3 mA is measured. What is the value of the resistor? 4.4 400 4 4 k 4.4 400 4 4 k ANSWER DOWNLOAD EXAMIANS APP
Ohm's Law How much resistance is required to limit the current from a 12 V battery to 3.6 mA? 2.2 k 22 k 3.3 k 33 k 2.2 k 22 k 3.3 k 33 k 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. 20 4 2 40 20 4 2 40 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 340 V 1.36 V 13.6 V 34.4 V 340 V 1.36 V 13.6 V ANSWER DOWNLOAD EXAMIANS APP
Ohm's Law If 24 V are applied across a resistor and there are 10.9 mA of current, the resistance is 220 k 22 k 2.2 k 220 220 k 22 k 2.2 k 220 ANSWER DOWNLOAD EXAMIANS APP
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