Understanding Capacitor Charging and Common Mistakes

What is one of the most common mistakes in A-level physics related to capacitors?

• Forgetting to discharge capacitors before use

• Incorrect calculation of time constant

• Misunderstanding the potential difference across a resistor

• Confusing series and parallel circuits

What is the formula for the potential difference across a charging capacitor?

• V = IR

• V = V₀ e^(-t/CR)

• V = EMF (1 - e^(-t/CR))

• V = EMF e^(t/CR)

If the time constant of a circuit is 10 seconds, what does this imply about the product of capacitance and resistance?

• C * R = 1 second

• C * R = 10 seconds

• C * R = 100 seconds

• C * R = 0.1 seconds

What is the potential difference across the capacitor if the potential difference across the resistor is 0.6 volts?

• 0.3 volts

• 1.2 volts

• 0.6 volts

• 0.9 volts

Why is it important to understand common mistakes in physics?

• To skip difficult topics

• To memorize formulas

• To impress teachers

• To avoid errors in exams