Parallel Circuits and Costs of Electricity

What is the main advantage of using parallel circuits in household wiring?

• They are cheaper to install.

• They allow appliances to operate independently.

• They reduce the risk of electrical fires.

• They consume less electricity.

In a parallel circuit, if one component fails, what happens to the rest of the components?

• All components stop working.

• The circuit becomes overloaded.

• The remaining components continue to work.

• The voltage across the circuit increases.

Which of the following is true about the total resistance in a parallel circuit?

• It is equal to the sum of individual resistances.

• It is less than the smallest individual resistance.

• It is equal to the largest individual resistance.

• It is greater than the sum of individual resistances.

How does the total current in a parallel circuit compare to the current through each branch?

• The total current is the same as the current through each branch.

• The total current is the sum of the currents through each branch.

• The total current is less than the current through each branch.

• The total current is more than the sum of the currents through each branch.

If a parallel circuit has three resistors of 6 ohms each, what is the total resistance?

• 2 ohms

• 6 ohms

• 18 ohms

• 0.5 ohms

Which of the following appliances would benefit most from being connected in a parallel circuit?

• A string of holiday lights

• A refrigerator

• A single light bulb

• A toaster

What happens to the total power consumption if more devices are added to a parallel circuit?

• It decreases.

• It remains the same.

• It increases.

• It becomes zero.

How does the voltage across each component in a parallel circuit compare to the total voltage?

• It is half of the total voltage.

• It is the same as the total voltage.

• It is double the total voltage.

• It varies depending on the component.

Which of the following best describes the cost of electricity?

• The amount of energy consumed over time.

• The rate at which energy is consumed.

• The total power used by all appliances.

• The price per unit of energy consumed.