OHM'S LAW QUIZ

How much resistance is required to limit the current from a 12 V battery to 3.6 mA?

33 k

22 k

2.2 k

3.3 k

TRUE ANSWER : ?
YOUR ANSWER : ?

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?

0 V

900 mV

9 V

18 V

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YOUR ANSWER : ?

How much resistance is needed to draw 17.6 mA from a 12 volt source?

6.8 k

680

212

68

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What is the voltage source for a circuit carrying 2 A of current through a 36 resistor?

18 V

7.2 V

1.8 V

72 V

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Four amperes of current are measured through a 24 resistor connected across a voltage source. How much voltage does the source produce?

96 V

8 V

9.6 V

960 V

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How much voltage is needed to produce 2.5 A of current through a 200 resistor?

8 V

50 V

80 V

500 V

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When 12 V are applied across a 68 resistor, the current is

17.6 mA

816 mA

176 mA

8.16 mA

TRUE ANSWER : ?
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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

3.2 V

320 V

8 V

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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

1.2

18

112

11.2

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An electric heater draws 3.5 A from a 110 V source. The resistance of the heating element is approximately

38.5

31

385

3.1

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