Parallel Circuits and Costs of Electricity

What is a parallel circuit?

• A circuit with only one path for current flow

• A circuit with multiple paths for current flow

• A circuit with no resistance

• A circuit with a single resistor

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

• The entire circuit stops working

• The rest of the circuit continues to work

• The voltage increases

• The current stops

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 more than the sum of individual resistances

How is the total current in a parallel circuit calculated?

• By adding the currents through each component

• By subtracting the smallest current from the largest

• By multiplying the currents through each component

• By dividing the total voltage by the total resistance

What happens to the total resistance if more resistors are added in parallel?

• It increases

• It decreases

• It remains the same

• It becomes infinite

What is the unit of electrical resistance?

• Volt

• Ampere

• Ohm

• Watt

If a parallel circuit has a total current of 6A and three branches with currents of 2A, 2A, and 2A, what is the total voltage if the resistance in each branch is 3 ohms?

• 6V

• 12V

• 18V

• 24V

Which of the following appliances would be most affected by a change in voltage in a parallel circuit?

• A light bulb

• A heater

• A fan

• A refrigerator

How does the cost of electricity relate to the power consumed by a device?

• Cost is directly proportional to power consumed

• Cost is inversely proportional to power consumed

• Cost is unrelated to power consumed

• Cost is only related to the voltage