Understanding Battery Internal Resistance and Terminal Voltage

The video tutorial explains how to calculate the internal resistance and terminal voltage of a battery. It covers the concept of terminal voltage, how it differs from the electromotive force (EMF), and how it changes with varying current and resistance. The tutorial provides step-by-step calculations for determining terminal voltage with different load resistances and demonstrates the effect of resistance on voltage drop. It also guides viewers on calculating the internal resistance of a battery using measured terminal voltage and current.

What is the term used to describe the actual internal voltage of a battery?

• Current

• Load Resistance

• Electromotive Force (EMF)

• Terminal Voltage

What symbol is used to represent the internal resistance of a battery?

• Lowercase v

• Capital R

• Capital V

• Lowercase r

When a battery is connected to a device with high resistance, what happens to the terminal voltage?

• It remains the same as the EMF

• It drops to zero

• It decreases slightly

• It increases significantly

In a high resistance scenario, what is the relationship between current and voltage drop?

• Higher resistance leads to higher voltage drop

• Higher current leads to lower voltage drop

• Higher resistance leads to lower voltage drop

• Higher current leads to higher voltage drop

How does the terminal voltage change when the load resistance is decreased?

• It remains constant

• It decreases

• It becomes equal to the EMF

• It increases

What happens to the current when the load resistance is decreased?

• It increases

• It remains the same

• It becomes zero

• It decreases

What is the terminal voltage when the load resistance is 1 ohm and the internal resistance is 0.1 ohms?

• 12 volts

• 11.9 volts

• 0 volts

• 10.91 volts

What is the first step in calculating the internal resistance of a battery?

• Measure the terminal voltage

• Measure the current

• Calculate the EMF

• Determine the load resistance

Which equation is used to calculate the internal resistance of a battery?

• E = IR + Vr

• I = E/R

• Vr = E - IR

• V = IR

What is the final step in calculating the internal resistance of a battery?

• Add the terminal voltage to the EMF

• Divide the voltage drop by the current

• Multiply the current by the load resistance

• Subtract the terminal voltage from the EMF