Electromotive force (emf)

What is electromotive force (EMF)?

• The force that drives electrical current through a circuit

• The force that opposes the flow of electrical current

• The amount of energy required to move a unit of electrical charge through a circuit

How is EMF generated?

• By the movement of electrons in a circuit

• By the difference in electrical potential between two points in a circuit

• By the transfer of energy from one electrical device to another

What is the relationship between EMF and voltage in a circuit?

• EMF and voltage are the same thing

• EMF is equal to the voltage of a battery

• EMF is the maximum voltage that can be produced in a circuit

How does the resistance in a circuit affect the EMF?

• It decreases the EMF

• It has no effect on the EMF

• It increases the EMF

What are some common devices that use EMF to generate electrical energy?

• Solar panels

• Batteries

• Generators