8TH GRADE PRACTICE
Physics Problems: Conductor connections, Grade 8
Series, parallel and mixed circuits.
Here the conditions and analysis of the solution can be read without an account. In the simulator, you need to collect the same analyzes yourself: “Given,” formulas, order of steps and answer.
Problem statements
The answer options are there to check against, and the walkthrough opens under each problem.
Problem #49
Serial connectionEvaluate the statement: The elements are connected one after the other without branching, so the same current passes through them.
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The total voltage is distributed between the elements, and the equivalent resistance is equal to the sum of the resistances.
Answer
Problem #50
Serial connectionEvaluate the statement: The concept of “Measuring a series circuit” means: A break in any element stops the current in the entire series circuit.
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Checking these relationships helps detect assembly errors and confirm connection rules.
Answer
Problem #51
Conductor connections4 ohm and 6 ohm resistors are connected in series and connected to 12 V. Find the total resistance and current.
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Answer
Problem #52
Parallel and mixed connectionEvaluate the statement: The elements are connected to the same pair of nodes, so the voltage on each branch is the same.
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The total current is equal to the sum of the branch currents, and adding a new branch reduces the equivalent resistance.
Answer
Problem #53
Parallel and mixed connectionEvaluate the statement: The concept of “Equivalent Resistance” means: A circuit contains series and parallel groups that are simplified in stages.
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For parallel branches, the equivalent resistance is less than any individual resistance.
Answer
Problem #54
Conductor connections6 ohm and 3 ohm resistors are connected in parallel at 12 V. Find the equivalent resistance and the total current.
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Answer
The theory behind these problems
Work through the topic if a problem will not give in.
Formulas by topic
Look up symbols and units of measurement in the reference.