a charged particle moving with a velocity v and magnetic field B.the magnetic force xperienced by the particle
459989
According to the Lorentz Force law:\n\nForce=q[E + v x B]\n\nso if there's no Electric field it will just be q(v x B) where q is the charge of the particle
573522
kinetic energy is 1/2 mv² so it depends on mass and velocity
1074720
none of the answers is correct , actually magnetic lines of force will be acting in anticlockwise direction.
873423
velocity is given by :\nv(t) = -1 + e^(1-t)\n\nacceleration is given by :\na(t) = - e^(1-t)\n\nSo :\na) \nv(3) = e^(-2) -1\na(3) = - e^(-2)\n\nb) at time t = 3, acceleration is negative. The speed of the particle is decreasing.\n\nc) whenever the particle changes direction, it is velocity is momentarily zero.\n\n=> 0 = -1 + e^(1-t)\n=> 1 - t = 0\n=> t = 1\n\nNote that velocity is positive for all times < 1, and is constantly decreasing. For all times > 1, velocity is negative. Thus, the particle changes direction at time t = 1.\n\nd) at time t = 0, \nx(t) = - e\n\nat time t = 1,\nx(t) = -1 - 1 = -2\n\ntotal distance travelled thus far = (e - 2)\n\nat time t = 3,\nx(t) = - 3 - e^(-2)\n\ntotal distance by the particle over the interval 1<=t<=3 is :\n1 + e^(-2)\n \ntotal distance travelled is :\n(e - 2) + (1 + e^(-2))\n= e - 1 + e^(-2)
310895
Magnetic flux \nweber: Wb = V s = W s/A = m^2 kg/s^2 A \n\nMagnetic flux density, magnetic induction \ntesla: T = Wb/m^2 = kg/s^2 A
115800
I hope you are familiar with atomic theory if not get familiar and come back to this. as an electron moves it creates a wake much like a boat moving through water this wake is called a magnetic line of force. if a nother electron is encountered by this wake it will be influenced by it like a surfer on a wave. an electromagnetic fiel is the area of influence of these waves. in most materials the electrons are moving in many different directions, hence the sum field is random and weak. however if most of the electrons are coerced into a uniform movement the individual lines become coherent and combine to provide a polarised field with a stronger magnetic influence moving this fiel across an object will cause the electrons in it to surf and produce an electric current. however these surfing electrons will produce a magnetic field that is the opposite of the field they are surfing on.
942587
poorcocoboiboi is correct, however the electric field is still there even after the charge is moving. In fact it is the moving electric field that produces the magnetic field.
805281
OK, first we need a formula for the motion, which, if it's simple harmonic motion is\nf(x) = Asin(kx)\nwhere A is 1.8*10^-4\nand k = 2000*2*pi\nSo f(x) = 1.8*10^-4*sin(4000*pi*x)\n\nTo compute the maximum force, we need the accelleration f''(x)\nf'(x) = 1.8*10^-4*(cos(4000*pi*x))*4000*pi, or \n1.8*4*pi*10^-1*cos(4000*pi*x)\n\nf''(x) = 1.8*4*pi/10*(-sin(4000*pi*x))*4000*pi\nor\n1.8*16*pi^2*100*(-sin(4000*pi*x))\nthe MAXIMUM acceleration is then 1.8*16*pi^2*100.\nThis is because you can find a value for x where -sin(4000*pi*x) is 1.\n\nUsing F=ma, the maximum force is 50 *1.8*16*pi^2*100 KG m/s^2, or approximately 1.42*10^6 KG m/s^2
598602
Since Magnetic field (B) = [K I(dl x r)]/r^3\n\nwhere I = current in the conductor\n      r = distance of the pt. from the conductor where u  want to find the magnetic field\n\nHere dl x r = vector product of small part of L i.e dl and r\n\nSee here that Magnetic field is directly proportional to Current....therefore when we increase the current by a factor of 4, magnetic field will also increase by a factor of 4.
419633
(m)\n\nIn physics, a magnetic field is an entity produced by moving electric charges (electric currents) that exerts a force on other moving charges. (The quantum-mechanical spin of a particle produces magnetic fields and is acted on by them as though it were a current; this accounts for the fields produced by "permanent" ferromagnets.)
25616
the force needed is according to newton's second law F=m.a where m=900Kg \n& the acceleration a=v/t\nthe velocity should decrease from 10 to 0 then v=10m/s & t=5 seconds\na=v/t=2m/s^2\nF=900*2=1800newtons
985678
Incoming momentum = p1 = mv1\nOutgoing momentum = p2  = mv2\nChange in momentum = p2 - p1 = m(v2-v1)\nThis change occurs in time, t.\nRate of change of momentum = m(v2-v1)/t = impressed force, f.\nm=0.149 kg, v1 = 43.4 m/s, v2 = -48.7 m/s, t = 1.1x10^-3 sec\n\nf = m(v2-v1)/t\nYou do the arithmetic.
977502
ok i fell asleep in physics, but...\n\n1/1837 th of the motion would be transferred to the atom.\n\nand 1836/1837ths would be the speed of the bounced electron.
127000
This problem is solved with the application of work and energy principle which states that total work done on a moving particle is equal to the change of its kinematics energy:\nW=T2-T1\nHere the only work done on the particle is dot to gravitation force and is equal to -m*g*h:\n\n-m*10*0.45 = (1/2)*m*(1)^2-(1/2)*m*(v)^2 --->\nm*v^2=(4.5+0.5)*m*2=10*m --->\nv=sqrt(10) m/s\n\nv is equal to sqare root of 10.(approximately 3.162 m/s)
643314
the particles are accelerated by electromagnetic fields, but since it only gives giga electron volts, which is much less than a joule, it wouldnt rreally move you. it proprably would however, electrocute you and cook you with gamma rays and such
985616
All are true. For the last one,\nsuppose acceleration = a.\nThen the velocity is at + c\nand the position is at^2/2 + ct + d,\nwhere c and d are constants.
486884
Magnetism is the property of magnetic materials to exert forces of certain objects, mainly iron and other magnetic materials; this force is known as the magnetic force.\n\nThe origin of this force is the movement of electrons or charged particles (ions) inside the materials.  When an electron spins around the atom's nucleus, according to the Biot-Savart Law it produces what we call a Magnetic Field, which exerts Magnetic Induction on it's surroundings.  Not only that, but also moving electrons in the surroundings of the original one (say, electrons of another object) will "feel" this induction as a force.\n\nSo, everything exerts a magnetic force on everything else, but the thing is that the magnetic induction and hence the direction of the force electrons in the surroundings will feel depend on the direction in which the original electron is moving (more specifically, on the vector Angular Momentum and/or the vector Magnetic Moment), and since there are lots of electrons moving in different directions in every material, the forces will point in every direction, cancelling themselves and producing a net force equal to zero.\n\nBut magnetic materials have the property of "aligning" the Angular Momentum/Magnetic Moments of all its atoms, and the forces produced by all its electrons (in the average) point in the same direction, producing the net force we feel when we put a magnet (magnetic material) near some piece of iron (a material susceptible to magnetism).\n\nHope I helped