Each battery has an emf of 1.7 volts. The length of the tungsten filament in each bulb is 0.012 m. The radius of the filament is 5 Γ 10-6 m (it is very thin!). The electron mobility of tungsten is 1.8 Γ 10-3 (m/s)/(V/m). Tungsten has 6 Γ 1028 mobile electrons per cubic meter. Since there are three unknown quantities, we need three equations relating these quantities. Use any two valid energy conservation equations and one valid charge conservation equation to solve for the following electric field magnitudes:
What is the magnitude of the electric field inside bulb #1?What is the magnitude of the electric field inside bulb #2?How many electrons per second enter bulb #1?How many electrons per second enter bulb #2?
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Physics, 21.06.2019 17:40
Current enters a circuit at a: 1.positive terminal 2.negative terminal 3.low potential side 4.resistor
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Amachinist turns the power on to a grinding wheel, at rest, at time t = 0 s. the wheel accelerates uniformly for 10 s and reaches the operating angular velocity of 96 rad/s. the wheel is run at that angular velocity for 40 s and then power is shut off. the wheel slows down uniformly at 1.5 rad/s2 until the wheel stops. in this situation, the time interval of deceleration is closest to:
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Answers: 2
Physics, 23.06.2019 03:20
2. which of the following does not affect the electrical resistance of a body? a. material composing the body b. bodies directly surrounding the body c. length of the body > d. temperature of the body
Answers: 2
Each battery has an emf of 1.7 volts. The length of the tungsten filament in each bulb is 0.012 m. T...
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