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 4 20 40 2 4 20 ANSWER DOWNLOAD EXAMIANS APP
Ohm's Law The formula to find I when the values of V and R are known is I = VR I = R/V I = V/R V = IR I = VR I = R/V I = V/R V = IR ANSWER DOWNLOAD EXAMIANS APP
Ohm's Law What is the approximate resistance setting of a rheostat in which 650 mA of current flows with a 150 V source? 9.7 230 97 23 9.7 230 97 23 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? 400 4.4 4 k 4 400 4.4 4 k 4 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? 590 mA 5.9 mA 27.2 mA 59 mA 590 mA 5.9 mA 27.2 mA 59 mA ANSWER DOWNLOAD EXAMIANS APP
Ohm's Law When there is 12 mA of current through a 1.2 k resistor, the voltage across the resistor is 100 V 1.4 V 14.4 V 10 V 100 V 1.4 V 14.4 V 10 V ANSWER DOWNLOAD EXAMIANS APP
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