S2.25 Parallel Circuits

Multiple Choice

Which of the following best describes the relationship between voltage, current, and resistance in a circuit according to Ohm's law?

• Current is equal to voltage divided by resistance.

• Voltage is equal to current divided by resistance.

• Resistance is equal to voltage times current.

• Current is equal to resistance divided by voltage.

Multiple Select

Which of the following are necessary to calculate the current in a circuit using Ohm’s Law?

• Voltage (V)

• Resistance (R)

• Power (P)

• Current (I)

Multiple Choice

Which of the following best describes what happens to the current in a circuit if the resistance increases while the voltage stays the same?

• The current increases

• The current decreases

• The current stays the same

• The current becomes zero

Multiple Choice

A resistor has a resistance of 280 Ω. How much current is in the resistor if there is a potential difference of 120 V across the resistor?

• 160 A

• 0.43 A

• 0.12 A

• 2.3 A

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​ https://phet.colorado.edu/sims/html/ohms-law/latest/ohms-law_en.html

Multiple Select

Which of the following statements are true about series circuits?

• There is only one path for current to flow.

• If one component fails, the others keep working.

• The total resistance is the sum of all resistances.

• The total current is the sum of all currents.

Multiple Choice

An electric kettle with 50-Ω heat element is powered by a 230-V wall outlet. The current flowing through kettle is:

• 0.217 A

• 4.6 A

• 10.86 A

• 11500 A

Multiple Choice

Which of the following statements about parallel circuits is correct based on the data?

• The total voltage increases as more bulbs are added

• The total current stays the same as more bulbs are added

• Each bulb receives the same voltage in parallel circuits

• The current through each bulb decreases as more bulbs are added

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​ https://phet.colorado.edu/sims/html/circuit-construction-kit-dc/latest/circuit-construction-kit-dc_all.html

Multiple Choice

Based on the data for series circuits, what happens to the total current as more bulbs are added in series?

• The total current increases

• The total current decreases

• The total current stays the same

• The total current fluctuates randomly