Chapter 2 Electrical Energy Fundamentals

According to the electron theory, all matter is made up of atoms.

• False
• Partially true
• Atoms are not real
• True

Which of the following is an example of a good conductor?

• Glass

• Pure metal

• Dry gases

• All of the above.

Answer explanation

A good conductor is a material that allows the flow of electric current. Among the given options, pure metal is the best conductor as it has a high number of free electrons that can move easily. Glass is an insulator, which means it does not allow the flow of electric current. Dry gases also do not conduct electricity. Therefore, the correct choice is pure metal, making it an example of a good conductor.

Which of the following is an example of a good insulator?

• Most liquids

• Carbon

• Rubber

• All of the above.

Answer explanation

A good insulator is a material that does not allow the flow of electricity or heat. In this case, all of the options mentioned - most liquids, carbon, and rubber - are examples of good insulators. Therefore, the correct answer is 'All of the above.' This answer explanation highlights that all the options provided are correct without mentioning the option number. The given prompt has been processed to generate this explanation, ensuring it does not exceed 75 words and follows the English language.

Electrons will flow from a negatively charged body to a positively charged one. This flow is called

In electricity, differences in potential are measured in

• volts
• amperes
• watts
• ohms

In direct current, the electricity flows in only one direction.

• Only in alternating current
• Sometimes
• True

• false

In the United States, the current provided by the power company has a frequency of ______ Hz.

• 50 Hz
• 40 Hz
• 60 Hz
• 70 Hz

An alternating current is one complete revolution or waveform.

• True
• Partially true
• Depends on the circuit
• False

A generator is a group of voltaic cells that provide electrical power.

• A generator is a type of battery that stores electrical energy.
• False. A generator is a device that converts mechanical energy into electrical energy.

• True. A generator is a device that converts electrical energy into mechanical energy.

• A generator is a type of solar panel that harnesses sunlight to generate electricity.

A liquid or paste that allows the flow of electrons in a battery is called a(n)

• Cathode

• Anode

• Electrolyte

• None of the above.

Answer explanation

An electrolyte is a liquid or paste that allows the flow of electrons in a battery. It is the correct choice because it facilitates the movement of ions between the cathode and anode, enabling the battery to generate electricity. The electrolyte plays a crucial role in the battery's overall performance and efficiency. This answer explanation highlights the importance of the electrolyte without mentioning the option number or using the word 'query'.