Understanding Internal Resistance

What is the primary cause of energy loss in a cell, leading to internal resistance?

• Movement of electrons from positive to negative end

• External resistance in the circuit

• Movement of charges within the cell

• Temperature changes in the cell

How does the presence of internal resistance affect the measured potential difference across a cell?

• It increases the potential difference

• It doubles the potential difference

• It has no effect on the potential difference

• It causes a voltage drop, reducing the potential difference

Which equation represents the relationship between EMF, terminal PD, and internal resistance?

• EMF = Terminal PD - I * R

• EMF = Terminal PD + I * R

• EMF = I * R + Terminal PD

• EMF = I * R - Terminal PD

What does the term 'V lost' refer to in the context of internal resistance?

• Voltage gained due to current flow

• Voltage gained across the cell

• Voltage lost across the internal resistor

• Voltage lost due to external resistance

How can the equation for EMF be further simplified when considering total resistance in a circuit?

• By ignoring the internal resistance

• By factoring out the current

• By adding external resistance

• By reducing the current to zero