The drift speed of electrons in a complete circuit, is typically a few millimeters per second. Yet a lamp 3.0 m away from a light switch turns on instantaneously when you flip the switch. Explain this apparent paradox.
Answer to relevant QuestionsTo move charges in metallic wires, an internal electric field must exist in the wire. In such a wire, are the electric field and the electric cur-rent in the same or opposite directions? Explain. Car batteries are often rated in “ampere-hours” or A ∙ h. (a) Show that the has units of charge and that 1 A ∙ h = 3600 C. (b) A fully charged, heavy-duty battery is rated at and can deliver a current of 5.0 A ...During a research experiment on the conduction of current in the human body, a medical technician attaches one electrode to the wrist and a second to the shoulder of a patient. If 100 mV is applied across the two electrodes ...When a resistor is connected to a 12-V source, it draws a 185-mA current. The same resistor connected to a 90-V source draws a 1.25-A current. (a) Is the resistor ohmic? Justify your answer mathematically. (b) What is the ...A freezer of resistance 10Ω is connected to a 110-V source. What is the power delivered when this freezer is on?
Post your question