Physics 202 Electric Circuits, Resistance, and Semiconductor Devices Exam QUESTIONS AND CORRECT VERIFIED ANSWERS |ALREADY GRADED A+|
Physics 202 Electric Circuits, Resistance, and Semiconductor Devices Exam QUESTIONS AND CORRECT VERIFIED ANSWERS |ALREADY GRADED A+| What is current electricity? The flow of electric charges in motion, as opposed to static electricity. What analogy is used to explain electric current? The flow of water from a higher to a lower tank through a hose. What is the formula for electric current (I)? I = ΔQ/Δt or Q/t, where I is the current, ΔQ is the charge, and Δt is the time. What is current density (j)? The concentration of current over the cross-section of a wire, calculated as j = I/A, where A is the area. What factors influence electric current (I)? Potential difference, area, length, and resistivity. What is Ohm's law? V = IR, where V is the voltage, I is the current, and R is the resistance. What does the symbol R represent in electrical circuits?
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