A proton moves in a uniform magnetic field of 69.7 mT in spiral motion with the radius of the helix 0.2 m and the pitch 8 m. What is the kinetic energy of the proton? Use the following constants: proton’s mass mp = 1.672e-27 kg, proton’s charge e = 1.6e-19 C, 1eV = 1.6e-19 J.

answer should be in cm

A charged particle, after entering a constant magnetic field B, starts moving freely along a circular path in the magnetic field applied perpendicular to the particle’s velocity (v).  What do you conclude about the particle’s kinetic energy (KE)? Group of answer choices KE remains unaltered as v and FB are perpendicular to each other KE increases under the constant magnetic force FB. KE decreases when magnetic force (FB) is perpendicular to the motion (v). KE and magnetic force FB are not correlated.

The MIT Francis Bitter Magnetic Laboratory has achieved a magnetic field of 37.2 T(as of 2004). Find the current necessary to produce such a field near the center of asolenoid with radius 2.40 cm, length 32.0 cm, and 4.00 · 104 turns

A proton travelling at a high velocity enters a 0.45 T magnetic field and travels in a circular path of radius 0.28 m as shown. A B=0.45 T X X X X X X X X X X X B What is the kinetic energy of the proton? And which path will the proton follow? A or B? x X X X X

An electron moves in a uniform circular motion under the action of an external magnetic field. -19 Consider the charge of the electron 9 = -1.6 × 10- v = 2.8 X 107 [C], the speed of the electron B = 2.1 x 10-³ [m/s] and the magnitude of the external magnetic field [T]. Calculate the radius R of the circle formed by the electron during its displacement. Write your answer in centimeters and round to the first decimal.

Part (a)  Express the magnitude of the magnetic force, F, in terms of q, v, and B. F = ______  Part (b)  Express the radius, R, of the circular motion in terms of the centripetal acceleration a and the speed v.  R = ______

HW #6

An electron moves in a circular path with a speed of 1.36 x 107 m/s in the presence of a uniform magnetic field with a magnitude of 1.84 mT. The electron's path is perpendicular to the field. (a) What is the radius (in cm) of the circular path? cm (b) How long (in s) does it take the electron to complete one revolution? S Read It

= The figure shows a solid metal object moving through a uniform magnetic field given by B (7.00 x 10-2T) k. The motion creates a potential difference of 1.30 x 103 V across the object, with the (unseen) bottom face negatively charged. What is the speed (m/s) of the object? d₁=5.00 x 102 m, d2= 3.00 x 102 m, d3 = 2.00 × 10² m. A do ds