Chapter 4: Q80P (page 919)
You are a technician testing the operation of a cyclotron. An alpha particle in the device moves in a circular path in a magnetic field
Short Answer
The mass of muon is
Chapter 4: Q80P (page 919)
You are a technician testing the operation of a cyclotron. An alpha particle in the device moves in a circular path in a magnetic field
The mass of muon is
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Get started for freeIn the circuit shown in Fig. E26.20, the rate at which R1 is dissipating electrical energy is 15.0 W. (a) Find R1 and R2. (b) What is the emf of the battery? (c) Find the current through both R2 and the 10.0 Ω resistor. (d) Calculate the total electrical power consumption in all the resistors and the electrical power delivered by the battery. Show that your results are consistent with conservation of energy.
A 5.00-A current runs through a 12-gauge copper wire (diameter
2.05 mm) and through a light bulb. Copper has
cubic meter. (a) How many electrons pass through the light bulb each
second? (b) What is the current density in the wire? (c) At what speed does
a typical electron pass by any given point in the wire? (d) If you were to use
wire of twice the diameter, which of the above answers would change?
Would they increase or decrease?
If a “75-W” bulb (see Problem 25.35) is connected across a 220-V potential difference (as is used in Europe), how much power does it dissipate? Ignore the temperature dependence of the bulb’s resistance.
The battery for a certain cell phone is rated at
The heating element of an electric dryer is rated at 4.1 kW when connected to a 240-V line. (a) What is the current in the heating element? Is 12-gauge wire large enough to supply this current? (b) What is the resistance of the dryer’s heating element at its operating temperature? (c) At 11 cents per kWh, how much does it cost per hour to operate the dryer?
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