Electricity and Magnetism #2 Free Response Question Solutions - AP Physics C 1998 Released Exam

The video tutorial covers the second electricity and magnetism free response question from the AP Physics C 1998 exam. It begins with an introduction to the circuit components, including a battery, resistors, a capacitor, and an inductor. The tutorial then guides viewers through various parts of the question, such as connecting a voltmeter, calculating potential differences, analyzing long-term circuit behavior, and understanding the effects of switching positions. It also discusses the behavior of inductors over time and formulates a differential equation for current. The video concludes with a transition to the next question.

What is the resistance of resistor one in the circuit?

• 20 ohms

• 10 ohms

• 15 ohms

• 5 ohms

How is the voltmeter connected to measure the potential difference across resistor one?

• In series with resistor one

• In series with the capacitor

• In parallel with the battery

• In parallel with resistor one

What is the initial current through resistor one when the switch is closed to position A?

• 1/3 amp

• 2/3 amp

• 1 amp

• 0 amp

After a long time with the switch in position A, what is the potential difference across resistor one?

• 20 volts

• 5 volts

• 10 volts

• 0 volts

What is the charge on the capacitor after a long time with the switch in position A?

• 3.00 * 10^-4 coulombs

• 2.00 * 10^-4 coulombs

• 4.00 * 10^-4 coulombs

• 1.00 * 10^-4 coulombs

What happens to the current through resistor one immediately after the switch is moved to position B?

• It increases

• It becomes maximum

• It decreases

• It remains zero

What is the current through resistor one after a long time with the switch in position B?

• 1/3 amp

• 1 amp

• 0 amp

• 2/3 amp

What is the energy stored in the inductor after a long time with the switch in position B?

• 0.444 joules

• 0.333 joules

• 0.222 joules

• 0.555 joules

What is the role of the inductor when the switch is moved to position B?

• It stores charge

• It resists changes in current

• It decreases the current

• It increases the current

What is the purpose of writing but not solving the differential equation in Part F?

• To measure the resistance

• To calculate the exact current

• To demonstrate understanding of the physics

• To find the potential difference