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Ohm's Law
What is the approximate resistance setting of a rheostat in which 650 mA of current flows with a 150 V source?
97
23
230
9.7
97
23
230
9.7
Answer
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Related Question
Ohm's Law
Approximately how much current flows through a 3.3 M resistor across a 30 V source?
9 A
90 A
900 A
9000 A
9 A
90 A
900 A
9000 A
Answer
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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
900 mV
0 V
9 V
18 V
900 mV
0 V
9 V
Answer
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Ohm's Law
How much resistance is required to limit the current from a 12 V battery to 3.6 mA?
22 k
3.3 k
33 k
2.2 k
22 k
3.3 k
33 k
2.2 k
Answer
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Ohm's Law
When there is 12 mA of current through a 1.2 k resistor, the voltage across the resistor is
1.4 V
14.4 V
10 V
100 V
1.4 V
14.4 V
10 V
100 V
Answer
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Ohm's Law
The formula to find I when the values of V and R are known is
I = VR
V = IR
I = R/V
I = V/R
I = VR
V = IR
I = R/V
I = V/R
Answer
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