Recall the lab where you used an oscilloscope to study the impact of a magnetic field on a beam of electrons. With no magnets or anything else turned on you now notice the beam spot which should be at the center of the scope is deflected to the right. Maybe it's broken, but there may be unknown external magnetic or electrical fields causing the deflection. You have nothing to create an additional electric or magnetic field. What could you do with the scope to determine if it is broken, in an electric field, or in a magnetic field? Explain. You cannot remove the oscilloscope from the room. Hint: A drawing might help.

Recall the lab where you used an oscilloscope to study the impact of a magnetic field on a beam of electrons. With no magnets or anything else turned on you now notice the beam spot which should be at the center of the scope is deflected to the right. Maybe it's broken, but there may be unknown external magnetic or electrical fields causing the deflection. You have nothing to create an additional electric or magnetic field. What could you do with the scope to determine if it is broken, in an electric field, or in a magnetic field? Explain. You cannot remove the oscilloscope from the room. Hint: A drawing might help.