Two liquids are taken in two beakers named A and B. When a wooden block of mass 20 N is placed in beaker A, it floats. When the wooden block is placed in B, it sinks. Then,
a) Which beaker displaces more liquid?
b) Why the wooden block sinks in beaker B?
c) If these two liquids taken in one beaker, which liquid will be on the top? Why?

stands for electromotive force and it is measured in volts. despite its name, it is not actually the force in the sense of being a "pushing" or "pulling" (not measured in newtons).an equation that relates emf,  ℰ,  to a battery's terminal voltage, v, current, i, and internal resistance, r, is    ℰ = v + irin this case, the emf can be interpreted as a voltage—a difference in electric potential.i would not say that it would be considered an energy. if emf can be defined as the energy/work per a unit charge from a battery or other electric source, then it is not strictly energy.