A cathode ray tube (CRT) is a device that produces a focused beam of electrons in a vacuum. The electrons strike a phosphor-coated glass screen at the end of the tube, which produces a bright spot of light. The position of the bright spot of light on the screen can be adjusted by deflecting the electrons with electrical fields, magnetic fields, or both. Although the CRT tube was once commonly found in televisions, computer displays, and oscilloscopes, newer appliances use a liquid crystal display (LCD) or plasma screen. You still may come across a CRT in your study of science. Consider a CRT with an electron beam average current of 25.00μ A . How many electrons strike the screen every minute?

Q: The moving charge has a charge of q = -2.0C and is moving inside electric and magnetic fields as…

A: Magnitude of electric force can be given as follows: Fe=qEFe=2×1000Fe=2000 N Since velocity and…

Q: A recent study found that electrons that have energies between 3.15 eV and 20.9 eV can cause breaks…

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Q: After being accelerated to a speed of 1.27x105 m/s , the particle enters a uniform magnetic field of…

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Q: What is the kinetic energy of an electron that passes undeviated through perpendicular electric and…

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Q: Problem 4: An electron travels with speed 1.0 × 107 m/sec between the two parallel charged plates…

A: Magnitude of magnetic field is 0.002 T and it is directed into the page.Explanation:

Q: Energy n = 3 6.0 eV 3.0 eV n = 2 1.0 eV n = 1 Figure shows an energy-level diagram for a quantum…

A: Given : E1 = 1 eV E2 = 3 eV E3 = 6 eV

Q: Find the energy of the following. Express your answers in units of electron volts, noting that 1 eV…

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Q: Thomson is best known for his discoveries about the re of cathode rays. His other important…

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Q: (10%) Problem 4: Consider the parallel-plate capacitor shown in the figure. The plate separation is…

A: Given data: Separation distance d=5.5mm=5.5×10-3m Electric field  E= 29 N/C

Q: A detector is situated 10 Meters from a cellphone . It receives a signal in which the electric…

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Q: EM radiation has an average intensity of 2900 W/m2. Which of the following statements about the E or…

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Q: EM radiation has both properties of a waves and a particles. The energy of these photons is directly…

A: The energy of these photons is directly proportional to what one property of the wave ?

Q: The human body has a surface area of approximately 1.8 m2, a surface temperature of approximately…

A: Given: The area A = 1.8 m2. The temperature T = 30 0C =303 K. Emissivity e = 0.97.

Q: Positively charged ions enter perpendicularly crossed fields at an electric field strength of E₁ =…

A: We are given magnetic and electric field in the region. We are given that some ions pass straight…

Q: lue laseT beam 1s incidehi on a Ime causing lo be ejectc ihe melal. II the frequency of the laser…

A: given, frequency of incident beam= increased intensity of laser beam = unchanged

Q: If I put a positive rod inside the cavity of a conductor and touch it inside, then take it away,…

A: When a positively charged rod is placed inside a cavity of the given conductor, Then it attracts…

Q: What is the kinetic energy of an electron that passes undeviated through perpendicular electric and…

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Q: Consider the mass spectrometer shown schematically in the figure below. The magnitude of the…

A: Ion moves in circular path when the magnitude of electric force equals the magnetic force. So, the…

Q: 0.220-A current is charging a capacitor that has circular plates 13.5 cm in radius. The plate…

A: Let I be the current, R be the radius of the circular plate capacitor, and d be the plate’s…

Q: At what distance from a 125 W electromagnetic-wave point source does Emax = 15.1 V/m?

A: We know ,the maximum electric field is given by

Q: A perpendicular polarized plane wave with an electric field amplitude of 18 V/m and a frequency of 5…

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Q: (electrostat Source region Ring electrodes (+) 0V Space focus plane +V,(>V) -Deflector plate Second…

A: Given: The diagram is shown below as, The mass spectrometer is depicted as, time-of-flight mass…

Q: After being accelerated to a speed of 1.21x105 m/s, the particle enters a uniform magnetic field of…

A: Required : q/m for the particle.

Electric Charges and Fields

One of the fundamental properties is the electromagnetic property. Charge cannot be destroyed by any process and this contributes formally to the law of charge conservation.