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- What is the voltage of a power source in a circuit that passes 3.6 A of current through a 4.2 Ω resistor?How did integrated silicon circuits (microchips) change electronics? a. They made electronic devices bulkier and heavier. b. They made electronic devices less effective and less useful. c. They made electronic devices smaller and more lightweight. d. They made electronic devices more expensive and less portable.A freezer that is never turned off draws an average current of 2.6 A when it is plugged into a 115 V outlet. What is the yearly cost of operating the freezer if the average cost of electricity is $0.18/kWh [round your final answer to zero decimal places]? If you were to replace the freezer in Question above with one that draws an average current of 3.5 A, would result in a lower electricity cost.
- Explain the mechanism of Electrochemical cells and Electrical generators ?Explain in detailHow do common types of batteries generate electrical energy? Elaborate your answers.Three resistors rated at 18 kΩ, 22 kΩ, and 4.4 kΩ are connected in parallel in a circuit. What is the equivalent resistance (in kΩ) of this combination of resistors [round your final answer to one decimal place]? What is the correct number of significant figures that should be used for the final answer of Question above
- What is the difference of ohmic and non-ohmic conductors in the relationship between current and voltage?In your own words, state the relationship between voltage and current in a circuit.Examine the diagrams below. They show models of the molecular structuresof two materials that an engineer is using to design an electric circuit. Material A has a low resistivity. Material B has a high resistivity. Identify the material that would be classified as a conductor and the one that would be classified as an insulator. Then explain how the molecular structure of each material determines whether it resists or allows the flow of electric current.
- Which of the following materials are likely to exhibit more conductive properties than insulating properties? _____ Explain your answers. a. rubber b. aluminum c. silver d. plastic e. wet skinHow can nanotechnology be used in the prevention and treatment of illnesses?Is a battery a device that produces electricity by transforming chemical energy into electrical energy?