IB Physics Relativity of E and B fields

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A tutorial sheet of questions on E and B fields is given below.

  1. A uniform magnetic field is along the z-axis. A reference frame moves relative to the magnetic field with its velocity vector parallel to the x-axis. Describe the fields according to an observer in the moving reference frame.
  2. A uniform electric field is along the z-axis. A reference frame moves relative to the electric field with its velocity vector parallel to the x-axis. Describe the fields according to an observer in the moving reference frame.
  3. Without special relativity there is no magnetism. Magnetic effects are a consequence of Einstein's special theory of relativity. True or false?
  4. Does Newton's third law apply in special relativity?

IB Mathematics Normal Distribution

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A tutorial sheet of practice questions on the normal distribution is given below.

  1. In a nation wide exam µ=65 and σ=15. Find (a) the percentage of marks greater than 70. (36.9) (b) the percentage of marks between 40 and 70. (58.3) (c) the probability that at least one of three randomly selected students scored more than 70. (d) the probability that two of three randomly selected students scored more than a certain score is 1/5. Find the score.
  2. More to come