Resistor Circuits - Practice Exercises 

Try each problem below - some practice exercises for you! 

Suggestion: First sketch a circuit diagram on a scrap 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.  

To check your answer: Place your cursor over the antenna symbol alongside. The correct solution will appear! You don't have to click. 

The SIMPLE circuit    

A Given I₁= 2 amp, and  R₁ = 3 ohm,  find Es.

B Given Es = 12 volt, R₁ = 2 ohm,  find I_1.   

C Given that Es = 100 volt, I₁ = 50 mA, find R_1. 

D Given that R₁ = 10 ohm, I₁ = 3 Amp, find the power dissipated in R_1. 

E Given that R₁ = 10 ohm, Es = 5 volt, find the power dissipated by R_1. 

 

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The PARALLEL circuit    

F Given I₁= 2 amp, and  I₂ = 4 amp,  find I₃.

 

G Given Es = 12 volt, I₃ = 2 amp, and that R1=R2, Find the value of each of  R1 and R2.  

 

H Given that R1 = 10 ohm, R2 = 10 ohm, and I₃ = 2 amp, find Es.

 

J Each resistor is 10 ohm, I₃ is 6 amp, what is the power dissipated by each resistor?  

 

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The SERIES circuit

K Given that R3=R4, and  Es = 12 volt,   find E3 and E4.

 

L Given Es = 12 volt, I₃ = 2 amp, and that R3=R4, Find the value of each of  R3 and R4.  

 

M Given that R3 = 10 ohm, R4 = 20 ohm, and I₃ = 2 amp, find Es.

 

N Each resistor is 10 ohm, I₃ is 6 amp, what is the power dissipated by each resistor?  

 

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SERIES and PARALLEL circuits

O Given I₁= 2 amp, and  I₂ = 4 amp,  find I₃.

P Given that R1 = R2 = 8 ohm, I₃ = 2 amp, Es = 12 volt,  find the total value of R3 and R4.  

 

Q Given that all resistors are 10 ohm, and I₃ = 2 amp, find Es.

 

R Each resistor is 10 ohm, I₃ is 6 amp, what is E1, E3, E4 and Es?  

 

S Each resistor is 10 ohm, I₃ is 6 amp, what is the power dissipated by each resistor?  

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