yFigure 3: 7= xi+ yj+zk = pcoscos oi + p sin oj + zk = pp+ zk and i =drdt-p sin oi + p cos oj + k = po + zk . Notice that cyclotron angular velocity we =doCOSis a negative constant, i.e. in the figure the particle is circulating clockwise.3. Consider a charged particle, q, in the presence of a magnetic field B with velocity i = it + üz = ü + ij at position relative to originexperiencing a magnetic force qü x B. From the second law it follows that the kinetic energy of the particle remains constant[ see figure 3] :d mv2m[v² + v?]du- 0 =dt(a) : qü x Bm ä - i [gữ x B] = ū. [m-= constant(True, False)dt 2(b) : A [B x Č)Č [Ä x B] = B IC x A] (True, False)

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3. Consider a charged particle, q, in the presence of a magnetic field B with velocity i = vt + 7z = 7 + T at position f relative to origin experiencing a magnetic force qü x B. From the second law it follows that the kinetic energy of the particle remains constant[ see figure 3] : du d mv? m[v로 + 매 dữ (a) : qü x B - 7. (gữ x B] = ở . (m-1 - 0 = (True, False) m a constant dt dt 2 (b) : Ä [B x Č) Č. [Ä x B] = B [Č × A] (True, False)

3. Consider a charged particle, q, in the presence of a magnetic field B with velocity i = vt + 7z = 7 + T at position f relative to origin experiencing a magnetic force qü x B. From the second law it follows that the kinetic energy of the particle remains constant[ see figure 3] : du d mv? m[v로 + 매 dữ (a) : qü x B - 7. (gữ x B] = ở . (m-1 - 0 = (True, False) m a constant dt dt 2 (b) : Ä [B x Č) Č. [Ä x B] = B [Č × A] (True, False)