Final answer:
The units of motional emf are volts, following the formula emf = Blv, which combines the magnetic field strength in teslas with the length of the object in meters and its speed in meters per second.
This correct answer is none of the above.
Step-by-step explanation:
The units of motional emf are volt. According to the formula emf = Blv, where B is the magnetic field strength in teslas (T), l is the length of the object in meters, and v is the speed of the object in meters per second (m/s),
it's clear that the units for emf come out to be volts (V) since tesla is defined as newton per ampere-meter (N/(A·m)) and
when this is multiplied by meters (m) and meters per second (m/s), the newtons (N) and amperes (A) cancel out leaving only volts (V). This aligns with the fact that the electromotive force (emf) is typically measured in volts.
This correct answer is none of the above.