18. a) A light bulb is connected via 2 copper wires of length L = 10 m and diameter d = 0.7 mm with a DC voltage source

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18 A A Light Bulb Is Connected Via 2 Copper Wires Of Length L 10 M And Diameter D 0 7 Mm With A Dc Voltage Source 1 (33.72 KiB) Viewed 37 times

18. a) A light bulb is connected via 2 copper wires of length L = 10 m and diameter d = 0.7 mm with a DC voltage source and a switch. The resulting current is I = 1 A and the density of charge carriers is n = 5 - 1028 m-3. • At time t = 0, the switch is flipped, closing the before open circuit. After what time tı does the lightbulb begin to shine? • After what time tz does the first electron from the voltage source reach the light bulb? • How long does the current need to be flowing, so that 1g of electrons has passed the cross section of the wire? The charge and mass of one electron is e = 1.6 - 10-19 and m. = 9.1.10-31 kg, respectively. b) Water flows through a garden hose at a volume flow rate dv/dt = 450 cm/s. What is the current of negative charge? The molar mass of water is mm = 0.018 kg/mol.