ther At time t 0 the capacitor is connected in series to two

Last updated: 5/5/2023

ther At time t 0 the capacitor is connected in series to two ammeters and a light bulb Immediately after the circuit is closed the ammeter connected to the positive plate of the capacitor reads Ip and the ammeter connected to the negative plate of the capacitor reads IN Figure 1 Each ammeter reads positive if current flows through the circuit in a clockwise direction from the to the terminal of the meter igure g 1 q 1 Ip A 1 of 1 Submit Correct Part D Previous Answers Light bulbs are often assumed to obey Ohm s law However this is not really true because their resistance increases substantially as the filament heats up in its working state A typical flashlight bulb at full brilliance draws a current of approximately 0 5 A when connected to a 3 V voltage source For this problem assume that the changing resistance causes the current to be 0 5 A for any voltage between 2 and 3 V Suppose this flashlight bulb is attached to a capacitor as shown in the circuit from the problem introduction If the capacitor has a capacitance of 3 F an unusually large but not unrealistic value and is initially charged to 3 V how long will it take for the voltage across the flashlight bulb to drop to 2 V where the bulb will be orange and dim Call this time thright Express bright numerically in seconds to the nearest integer View Available Hint s tbright Submit VAZO S