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Ohm's Law.pdf
A
A circuit containsa 1.5 volt battery and a bulb with a resistanceof 3 ohms. Calculate the current.
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4. A circuit contains two 1.5 volt batteries and a bulb with a resistance of3 ohms. Calculate the current.
5. Whatis the voltage ofa circuit with 15 amps ofcurrent and toaster with 8 ohms ofresistance?
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6. Alight bulb has a resistance of4 ohms and a current of 2 A. Whatis the voltage across the bulb?
7. How much voltage would be necessary to generate 10 amps ofcurrentin a circuit that has 5 ohms of
resistance?
8.
How many ohms of resistance must be presentin a circuit that has 120 volts anda current of 10 amps?
9. Analam clock draws 0.5 A ofcurrent when connected to a 120 voltcircuit. Calculateits resistance.
10. A portable CD playeruses two 1.5 V batteries.If the currentin the CD player is 2 A, what is its resistance?
11. You have a large flashlightthattakes 4 D-cell batteries.Ifthe currentin the flashlightis 2 amps, whatis the
resistance ofthe light bulb? (Hint: A D-cell battery has 1.5 volts.)
12. Use the diagram below to answer the following problems.
13.
14,
15,
16.
17.
a. Whatis the total voltage in each circuit?
b. How much current would be measured in each circuit if the light bulb has a resistance of6 ohms?
. How much current would be measured in each circuit if the lightbulb has a resistance of 12 ohms?
d. Isthe bulb brighter in circuit A or circuit B? Why?
What happens to the currentin a circuit ifa 1.5-volt battery is removed and is replaced by a 9-volt battery?
In your own words, state the relationship between resistance and currentin a circuit.
In your own words,state therelationship between voltage and current in a circuit.
What could you do to a closed circuit consisting of2 batteries, 2 light bulbs, and a switch to increase the
current? Explain your answer.
What could you do to a closed circuit consisting of2 batteries, 2 light bulbs, and a switch to decrease the
current? Explain your answer.
18. You have four 1.5 V batteries, a 1 €2 bulb, a 2 Q bulb, and a 3 ©2 bulb. Draw a circuit you could build to
create eack. ofthe followingcurrents. There may be more than onepossible answer for each.
a lampere
b, 2amperes
. 3amperes
d. 6amperes