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Answer the following questions. 200 word of each question and a reference of them. 1. Why does the final electron energy not depend on the grid voltage? 2. Can you think of a reason as to why the cathode is not directly heated by current? 3. Do you think the electrons emitted from the cathode with zero velocity, one velocity, or a range of velocities? Hint: The electrons inside the metal that are able to escape are a bit like a gas of molecules at finite temperature. 4. The coils are connected in series. Why would connecting them in parallel be a bad idea? 5. Why doesn't the magnetic field change the speed of the electrons? (Speed is taken to be the magnitude of the velocity. The velocity is a vector.) 6. At 5 A, what is the magn-etic field produced at the center of the Helmotz coils in gauss? About what is the magnitude of the Earth's field in gauss? 7. What would be the electron orbits if the initial velocity of the electrons was parallel or anti-parallel to the magnetic field? 8. What would be the electron orbits if the initial velocity of the electrons was 45 degrees to the magnetic field?
A magnetic field of 0.436 T and a perpendicular electric field of 5.54 kV/m act on a moving electron to produce no net force. Discover the speed of the electron. Give the answer in kilo-meter/second (km/s) and to two decimal places.
suppose an electron is accelerated by an electric field between two plates plate a and plate b. assume the electron
question a satellite circles planet roton every 6.3 h in an orbit having a radius of 2.9 times 107 m. if the radius of
a solenoid had an inductance of l and carries a current of 15 a if the current goes from 15 a to 0 a in time fo 75 ms
A converging lens with focal length of 11.8 cm is placed in contact with a diverging lens with a focal length of 21.1 cm. What is the focal length of the combination
An automobile having a mass of 1750 kg is placed on a hydraulic lift in a garage. The piston lifting the car is 0.235 m in diameter. What is the force exerted on the small piston
A pipe 0.026 m in diameter and 0.22 m long can transfer 3476 J of heat per second with a temperature difference across the ends of 7?C. Compare this performance with the heat transfer of a solid silver bar of the same di- mensions by finding the rati..
In designing rotating space stations to provide for artificial-gravity environments, one of the constraints that mustbe considered is motion sickness. Studies have shown that thenegative effects of motion sickness begin to appear when the rotation..
A golfer wants to land a golf ball on the greenlocated 155m away horizontally but 4.0m higher. find With what velocity should the ball leave the tee
A 35 microfarad capacitor is in series with a 250 ohm resistor and10V battery. Initally a switch in the circuit is open and the capcitor is uncharged. What is the current in the circuit immediately after the switchis closed?
an electron gun emits 17 times 1014 electrons per second that travel at a speed of 0.03 c. the electron beam has a
Two tiny conducting spheres are identical and carry charges of -21.4C and +51.0C. They are separated by a distance of 3.30 cm. (a) What is the magnitude of the force that each sphere experiences?
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