An electron beam passes through a magnetic field 2 x 10-³Wb/m² and an electric field of 3.4 x 104 V/m, both fields are normal to each other and acting simultaneously in the same region. The path of electrons remains unchanged. Calculate the electron speed. If the electric field is switched off, what will be radius of the circular path?
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- can you please ans (a) (b) (c)?13. You have decided to use a magnetic field in combination with an electric field as a switch to either make a beam of electrons pass straight through a certain region of an apparatus or to curve 90° and go through an auxiliary portion of the apparatus. The beam of electrons travels to the right at a speed of 4.8 x 106 m/s and you designed the electric field (8400 V/m) to be oriented 10⁰ vertically up. a) When the electric field is on, what strength of B-field is necessary for the beam to travel un-deflected? (Note: You can ignore gravity.) b) What is the orientation of the B-field? c) When the electric field is turned off, how long does it take an electron to turn into the auxiliary apparatus?What is the magnitude and direction of the acceleration on the electron in a 3T magnetic field ( -k) and an 800 V/m (-j) electric field, shown below (neglecting gravity), if its velocity is 300 m/s? X X X B= 3.0 T X X X X X X X X X X E=800 V/m 3.512 EE+13 m/s2 (j) -3.512 EE+13 m/s2 (j) 3.512 EE-13 m/s2 (k) 2.489 EE+13 (j) -2.489 EE+13 (j)
- (a) A velocity selector consists of electric and magnetic fields described by the expressions E = Ek and B = Bj, with B = 24.0 mT. Find the value of E (in kV/m) such that a 780 eV electron moving in the negative x-direction is undeflected. 3.97e24 How do you determine the speed of the electron if you know its kinetic energy? kV/m (b) What If? For the value of E found in part (a), what would the kinetic energy of a proton have to be (in MeV) for it to move undeflected in the negative x-direction? MeVIf the protons are moving in a circular orbit with a radius of 5.1 cm under a 0.566 T magnetic field, what is the electric field strength in MV/m (mega Volts per meter) that must be applied to make the path of motion linear?Determine the velocity of a beam of electrons that goes un-deflected when moving perpendicular to an electric and a magnetic field. E and B are also perpendicular to each other and have magnitudes 7.7 x103 V/m and 7.5x10-3T, respectively.
- A pellet which holds a charge of 10 coulombs is moving upwards (+Y) and driven by an electric field in the same direction with a magnitude of 50 V/m. There is a magnetic field with a magnitude of 25 Tesla’s pointing downwards (-Y). How fast does the pellet need to be going for the magnetic force to cancel the electric force? Group of answer choices 0.5 m/s 2 m/s 4 m/s The forces will cancel out at any speed the pellet may be travelling In this case, the electric force cannot be canceled out by the magnetic forceAn electric field with initial magnitude 210 V/m directed into the page and increasing at a rate of 13.0 V/(ms) is confined to the area of radius R = 15.0 cm in the figure below. If r = 45.0 cm, what are the magnitude and direction of the magnetic field at point A? magnitude direction ---Select--- Ø Ø A O RA beam of electrons with velocity vx = 5 x105 m/s is introduced into a uniform magnetic field Bz = 30 mTesla. An electric field Ey is applied perpendicular to both the initial velocity and the magnetic field. What value of electric field must be applied to leave the electron beam undeflected?