determine the emf required to run 0.020 amps of current in a circuit with three 50-ohm resistors connected in series.

3.0 v
0.33 v
0.17 v
1.5 v

Question

determine the emf required to run 0.020 amps of current in a circuit with three 50-ohm resistors connected in series.

3.0 v
0.33 v
0.17 v
1.5 v

Accepted Answer

{ "quality": "clear", "question_count": 1, "skills_matched": [ "step_cot", "multiple_choice_formatter", "explain_then_answer", "quick" ], "needs_drawing": false, "concepts_used": [ "Equivalent Resistance", "Series and Parallel Circuits", "Ohm's Law" ], "new_concepts": [], "current_concepts": [ "Equivalent Resistance", "Series and Parallel Circuits", "Ohm's Law" ] } ## Calculate equivalent resistance of series resistors $$ \begin{aligned} R_{\text{eq}} &= R_1 + R_2 + R_3 \ R_{\text{eq}} &= 50\,\Omega + 50\,\Omega + 50\,\Omega = 150\,\Omega \end{aligned} $$ ## Calculate required EMF using Ohm's law $$ \begin{aligned} V &= I \cdot R_{\text{eq}} \ V &= 0.020\,\text{A} \cdot 150\,\Omega = 3.0\,\text{V} \end{aligned} $$

(A) 3.0 V

(B) 0.33 V

(C) 0.17 V

(D) 1.5 V

{ "subject": "Natural Science", "question_type": "Multiple Choice", "knowledge_point": [ "Natural Science", "Physics", "Ohm's Law" ] }

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Question

Explanation:

Calculate equivalent resistance of series resistors

Calculate required EMF using Ohm's law

Answer: