When placed in a magnetic field, ferrous materials become magnetized, intensifying the magnetic field. What effect would placing a ferrous bar in the primary coils have on the magnetic flux in the secondary coil?

(a) An oscilloscope probe is used to measure the voltage across a resistor. Why is this related to the current in the circuit?

(b) What does Vb/Va tell me when the oscilloscope probe A measures the total voltage while probe B measures the only voltage across the resistor?

(c) What does a galvanometer measure and in what units does the galvanometer measure it in?