1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Alex_Xolod [135]
3 years ago
5

An electron in a vacuum is first accelerated by a voltage of 51400 V and then enters a region in which there is a uniform magnet

ic field of 0.4 T at right angles to the direction of the electron’s motion. The mass of the electron is 9.11 × 10−31 kg and its charge is 1.60218 × 10−19 C. What is the magnitude of the force on the electron due to the magnetic field?
Physics
1 answer:
zimovet [89]3 years ago
5 0

Answer:

       F = 8.6 10⁻¹² N

Explanation:

For this exercise we use the law of conservation of energy

Initial. Field energy with the electron at rest

         Em₀ = U = q ΔV

Final. Electron with velocity, just out of the electric field

         Emf = K = ½ m v²

          Em₀ = Emf

          e ΔV = ½ m v²

          v =√ 2 e ΔV / m

          v = √(2 1.6 10⁻¹⁹ 51400 / 9.1 10⁻³¹)

           v = √(1.8075 10¹⁶)

           v = 1,344 10⁸ m / s

Now we can use the equation of the magnetic force

         F = q v x B

Since the speed and the magnetic field are perpendicular the force that

        F = e v B

        F = 1.6 10⁻¹⁹  1.344 10⁸ 0.4

       For this exercise we use the law of conservation of energy

Initial. Field energy with the electron at rest

         Emo = U = q DV

Final. Electron with velocity, just out of the electric field

         Emf = K = ½ m v2

          Emo = Emf

          .e DV = ½ m v2

          .v = RA 2 e DV / m

          .v = RA (2 1.6 10-19 51400 / 9.1 10-31)

           .v = RA (1.8075 10 16)

           .v = 1,344 108 m / s

Now we can use the equation of the magnetic force

         F = q v x B

Since the speed and the magnetic field are perpendicular the force that

        F = e v B

       F = 1.6 10-19 1,344 108 0.4

       F = 8.6 10-12 N

You might be interested in
3. What is the power of a derby race car that uses a 50 N force to travel 20 meters in 10 seconds?
makkiz [27]
I think it is B. 100 W
7 0
3 years ago
Select the correct statement to describe when a sample of liquid water vaporizes into water vapor
sweet-ann [11.9K]

Answer:

This procces is called evaporation.

Explanation:

When you have liquid water that is transformed into steam, a phase change is called evaporation. The temperature for the evaporation of water depends on the pressure, for example for water at atmospheric pressure the temperature of evaporation is equal to 100°C. as the pressure increases are achieved evaporation temperatures higher. When that happens, the phase change temperature of the water is not increasing, as the process that takes place is the transfer of latent heat and applies only to changes of phase, that is to say at atmospheric pressure when it has 100% of the steam this will be at 101°C.

8 0
3 years ago
which statement best describes what would happen if the number of wore coils in a electromagnavneg were increased
jekas [21]
Where are the following choices
4 0
3 years ago
Question 23 of 32
marshall27 [118]
Do you still need help?!?!
7 0
3 years ago
Which of the following are NATURAL resources? Which of the following are NATURAL resources? Select all that apply.
scoundrel [369]
Wood, water, Forests. The rest can have harm to the nature.
4 0
3 years ago
Read 2 more answers
Other questions:
  • Which object absorbs the most visible light?
    10·2 answers
  • Hey, what is antimatter
    6·2 answers
  • The __ is responsible for determining the frequency of vibration of the air column in the pool with in a wind instrumen . A. Typ
    15·2 answers
  • You should always wear your seatbelt just in case the car comes to an abrupt stop. The seatbelt will hold you in place so that y
    8·2 answers
  • A ball of putty is dropped from a height of 2 m onto a hard floor, where it sticks. Part A What object or objects need to be inc
    9·1 answer
  • Oxygen enters the blood through the.... I do not know the answer. Can someone please help me?!?!
    5·2 answers
  • A book is sitting on a table, completely still. What would happen if gravity suddenly stopped affecting the book? A. The book wo
    5·1 answer
  • Airbags and safety belts can reduce injuries because they can
    9·1 answer
  • Help a Girl Out and Answer This you will get Brainliest, Thanks, and more points if your answer is correct (:
    9·1 answer
  • What pressure is exerted on the bottom of a 0.500-m-wide by 0.900-m-long water tank that can hold 50.0 kg of water by the weight
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!