Easy 8 points
how does a fuse protect a toaster?

a. when the current is too high, a metal strip in the fuse melts and opens the circuit.
b. when the current is too high, a resettable switch opens the circuit.
c. when the resistance is too high, a resettable switch opens the circuit.
d. when the resistance is too high, a metal strip in the fuse melts and opens the circuit.

It's A. When the current is too high the metal strip melts and opens the circuit. :)

The fuse breaks the circuit if a fault in an appliance causes too much current flow. This protects the wiring and the appliance if something goes wrong. The fuse contains a piece of wire that melts easily. If the current going through the fuse is too great, the wire heats up until it melts and breaks the circuit.

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.

When the warmer parts go up and the colder parts go down in a circular motion.