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Know about Ohm’s Law
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Question 1 of 10
1. Question
1 pointsThe formula to find I when the values of V and R are known is
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Question 2 of 10
2. Question
1 pointsIf 750 µA is flowing through 11 k of resistance, what is the voltage drop across the resistor?
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Question 3 of 10
3. Question
1 pointsA resistor is connected across a 50 V source. What is the current in the resistor if the color code is red, orange, orange, silver?
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Question 4 of 10
4. Question
1 pointsHow much resistance is required to limit the current from a 12 V battery to 3.6 mA?
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Question 5 of 10
5. Question
1 pointsWhat is the approximate resistance setting of a rheostat in which 650 mA of current flows with a 150 V source?
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Question 6 of 10
6. Question
1 pointsYou 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?
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Question 7 of 10
7. Question
1 pointsIf 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?
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Question 8 of 10
8. Question
1 pointsA current of 200 µA through a 6.8 kilohms resistor produces a voltage drop of
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Question 9 of 10
9. Question
1 pointsA 120 V lampdimming circuit is controlled by a rheostat and protected from excessive current by a 3 A fuse. To what minimum resistance (in ohms) value can the rheostat be set without blowing the fuse? Assume a lamp resistance of 20 ohms.
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Question 10 of 10
10. Question
1 pointsWhat is the approximate filament resistance( in ohms) of a light bulb if it operates from a 110 V source and 0.6 A of current is flowing?
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