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Questions and Answers
Which of the following statements correctly differentiates electrical power and electrical energy?
Which of the following statements correctly differentiates electrical power and electrical energy?
- Electrical power is the rate at which electrical energy is used, while electrical energy is the total amount of work done by the power over time. (correct)
- Electrical power is the total amount of work done by electricity, while electrical energy is the rate at which electricity is used.
- Electrical power and electrical energy are essentially the same and can be used interchangeably in most contexts.
- Electrical power is the ability of electricity to do work, while electrical energy is the measure of voltage and current in a circuit.
What is the relationship between electrical power and electrical energy?
What is the relationship between electrical power and electrical energy?
- Electrical power and electrical energy have a linear relationship, with power being directly proportional to energy.
- Electrical power is the derivative of electrical energy with respect to time.
- Electrical energy is the integral of electrical power with respect to time. (correct)
- Electrical power and electrical energy are independent of each other in electrical systems.
In an electrical circuit, what happens to the electrical power if the voltage is doubled and the current is halved?
In an electrical circuit, what happens to the electrical power if the voltage is doubled and the current is halved?
- The electrical power is doubled.
- The electrical power remains the same. (correct)
- The electrical power is halved.
- The electrical power is quadrupled.
What is the primary function of a circuit breaker in a household electrical system?
What is the primary function of a circuit breaker in a household electrical system?
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What is the purpose of fuses in a household electrical system?
What is the purpose of fuses in a household electrical system?
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What happens when there is an overload in an electrical circuit protected by a circuit breaker or a fuse?
What happens when there is an overload in an electrical circuit protected by a circuit breaker or a fuse?
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