Here are the step-by-step solutions for the problems on your worksheet.
1. What is the current in a 160V circuit if the resistance is 2Ω?
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Given: Voltage ($V$) = 160 V, Resistance ($R$) = 2 Ω
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Formula: $I = \frac{V}{R}$
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Calculation: $I = \frac{160}{2} = 80$
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Answer: The current is
80 A.
2. What is the current in a 160V circuit if the resistance is 20Ω?
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Given: Voltage ($V$) = 160 V, Resistance ($R$) = 20 Ω
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Formula: $I = \frac{V}{R}$
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Calculation: $I = \frac{160}{20} = 8$
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Answer: The current is
8 A.
3. What is the current in a 160V circuit if the resistance is 10Ω?
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Given: Voltage ($V$) = 160 V, Resistance ($R$) = 10 Ω
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Formula: $I = \frac{V}{R}$
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Calculation: $I = \frac{160}{10} = 16$
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Answer: The current is
16 A.
4. What is the current in a 160V circuit if the resistance is 5Ω?
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Given: Voltage ($V$) = 160 V, Resistance ($R$) = 5 Ω
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Formula: $I = \frac{V}{R}$
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Calculation: $I = \frac{160}{5} = 32$
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Answer: The current is
32 A.
5. Based on questions 2, 3, and 4, what happens to the current in a circuit as the resistance decreases? Increases?
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Observation: As resistance went down (from 20Ω to 10Ω to 5Ω), the current went up (from 8A to 16A to 32A).
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Answer: The current
increases.
6. What voltage is required to move 6A through 5Ω?
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Given: Current ($I$) = 6 A, Resistance ($R$) = 5 Ω
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Formula: $V = I \times R$
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Calculation: $V = 6 \times 5 = 30$
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Answer: The voltage is
30 V.
7. What voltage is required to move 6A through 10Ω?
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Given: Current ($I$) = 6 A, Resistance ($R$) = 10 Ω
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Formula: $V = I \times R$
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Calculation: $V = 6 \times 10 = 60$
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Answer: The voltage is
60 V.
8. What voltage is required to move 6A through 20Ω?
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Given: Current ($I$) = 6 A, Resistance ($R$) = 20 Ω
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Formula: $V = I \times R$
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Calculation: $V = 6 \times 20 = 120$
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Answer: The voltage is
120 V.
9. Based on questions 6, 7, and 8, what happens to the voltage required in a circuit as the resistance decreases? Increases?
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Observation: As resistance went up (from 5Ω to 10Ω to 20Ω), the required voltage went up (from 30V to 60V to 120V). Therefore, as resistance *decreases*, voltage *decreases*.
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Answer: The voltage required
decreases.
Parent Tip: Review the logic above to help your child master the concept of ohms law practice worksheet.
