Apoint charge is moving with speed 2 × 107 m/s parallel to the x axis along strait line at y=2 m. at t = 0, the charge is at x = 0 m. the magnitude of the magnetic field at x = 4 m is b0 at the origin. the magnitude of the magnetic field at at origin when t = 0.15 μs is?

Daughter element the new element produced along with a decay particle in a nuclear transmutation 2. half-life the substance that decays in a nuclear transmutation 3. parent element the change of one chemical element into another by nuclear decay or radioactive bombardment 4. transmutation the time required for the decay of one-half of the atoms in a sample of radioactive material