Ohm's law **|**
Resistance **|**
Power Calculations

**Try Each Problem Below - Some Practice Exercises For You**

### Suggestion

First sketch a circuit diagram on a piece of paper. Enter the information that you are given. Write down what you have to find too - the missing information. Then decide how the various Ohm's Law formulas can be used to find the solution.

Nominal *names* are given in these circuits to identify the current, the voltage and the resistors themselves.

Place your cursor over the antenna symbol to check your answer. The correct solution will appear. You don't have to click. If this method does not work, the answers for each question, follows at the end of the questions.

### The SIMPLE Circuit

**A** Given I_{1}= 2 amp, and R_{1} = 3 ohm, find Es

**B** Given Es = 12 volt, R_{1} = 2 ohm, find I_{1}

**C** Given that Es = 100 volt, I_{1} = 50 mA, find R_{1}

**D** Given that R_{1} = 10 ohm, I_{1} = 3 Amp, find the power dissipated in R_{1}

**E** Given that R_{1} = 10 ohm, Es = 5 volt, find the power dissipated by R_{1}

### The PARALLEL Circuit

**F** Given I_{1}= 2 amp, and I_{2} = 4 amp, find I_{3}

**G** Given Es = 12 volt, I_{3} = 2 amp, and that R_{1}=R_{2}, Find the value of each of R_{1} and R_{2}

**H** Given that R_{1} = 10 ohm, R_{2} = 10 ohm, and I_{3} = 2 amp, find Es

**J** Each resistor is 10 ohm, I_{3} is 6 amp, what is the power dissipated by each resistor?

### The SERIES Circuit

**K** Given that R_{3}=R_{4}, and Es = 12 volt, find E_{3} and E_{4}

**L** Given Es = 12 volt, I_{3} = 2 amp, and that R_{3}=R_{4}, Find the value of each of R_{3} and R_{4}

**M** Given that R_{3} = 10 ohm, R_{4} = 20 ohm, and I_{3} = 2 amp, find Es

**N** Each resistor is 10 ohm, I_{3} is 6 amp, what is the power dissipated by each resistor?

### SERIES and PARALLEL Circuits

**O** Given I_{1}= 2 amp, and I_{2} = 4 amp, find I_{3}

**P** Given that R_{1} = R_{2} = 8 ohm, I_{3} = 2 amp, Es = 12 volt, find the total value of R_{3} and R_{4}

**Q** Given that all resistors are 10 ohm, and I_{3} = 2 amp, find Es

**R** Each resistor is 10 ohm, I_{3} is 6 amp, what is E_{1}, E_{3}, E_{4} and Es?

**S** Each resistor is 10 ohm, I_{3} is 6 amp, what is the power dissipated by each resistor?

### Answers For The SIMPLE Circuit

**A** Es = 6 volt

**B** I_{1} = 6 amp

**C** R_{1} = 2000 ohm

**D** the power dissipated in R_{1} = 90 watt

**E** the power dissipated by R_{1} = 2.5 watt

### Answers For The PARALLEL Circuit

**F** I_{3} = 6 amp

**G** R_{1} = 12 ohm and R_{2} = 12 ohm

**H** Es = 10 volt

**J** the power dissipated by each resistor is 90 watt

### Answers For The SERIES Circuit

**K** E_{3} = 6 volt and E_{4} = 6 volt

**L** R_{3} = 3 ohm and R_{4} = 3 ohm

**M** Es = 60 volt

**N** the power dissipated by each resistor is 360 watt

### Answers For SERIES and PARALLEL Circuits

**O** I_{3} = 6 amp

**P** the total value of R_{3} and R_{4} is 2 ohm

**Q** Es = 50 volt

**R** E_{1} = 30 volt, E_{3} = 60 volt, E_{4} = 60 volt and Es = 150 volt

**S** the power dissipated by each resistor is R_{1} = 90 watt; R_{2} = 90 watt; R_{3} = 360 watt; R_{4} = 360 watt