Upper Sec_EMF and PD

What is the definition of electromotive force (e.m.f.)?

• The energy stored in a resistor

• The potential difference between two points in a circuit

• The work done by a source (battery) in moving a unit charge around a complete circuit

• The work done in moving a unit charge through an electrical component

What is the SI unit for electromotive force (e.m.f.)?

• Volts

• Watts

• Ohms

• Amps

What is the definition of potential difference?

• The energy stored in a capacitor

• The potential difference between two points in a circuit

• The work done by a source (battery) in moving a unit charge around a complete circuit

• The work done in moving a unit charge through an electrical component

What is another name for potential difference?

• Resistance

• Voltage

• Current

• Power

What is the equation relating potential difference (V), energy (E), and charge (Q)?

_____ = Q _____

What is the instrument for measuring potential difference, e.m.f., and voltage?

• Ohmmeter

• Galvanometer

• Voltmeter

• Ammeter

Where is the e.m.f. measured in a circuit?

• Battery

• Lamp

• Switch

• Resistor

Where is the potential difference measured in a circuit?

• Resistor

• Lamp

• Battery

• wire

What is the work done by a source (battery) in moving a unit charge around a complete circuit called?

• Electromotive force

• Current

• Voltage

• Potential difference

What is the work done in moving a unit charge through an electrical component called?

• Electromotive force

• Current

• Voltage

• Potential difference