Equations to Memorize for AP Physics C: Electricity and Magnetism

The video tutorial covers key concepts for the AP Physics C electricity and magnetism exam, emphasizing the importance of memorization for efficiency. It explains charge quantization, electric fields, Gauss's Law, and electric flux. The tutorial also discusses resistors, capacitors, RC and LR circuits, and the derivation of equations for inductance and LC circuits, highlighting the significance of understanding derivations over rote memorization.

Why is it sometimes beneficial to memorize certain equations for the AP Physics C exam?

• To impress the examiner

• To confuse other students

• To save time during the exam

• To avoid using the equation sheet

What is the law of charges?

• Opposite charges repel, like charges attract

• All charges repel each other

• All charges attract each other

• Opposite charges attract, like charges repel

What is the equation for the electric field around a point charge?

• Electric field equals test charge times distance

• Electric field equals charge divided by distance squared

• Electric field equals electrostatic force divided by test charge

• Electric field equals charge times distance

Which of the following is a unit for surface charge density?

• Coulombs per meter

• Coulombs per meter cubed

• Coulombs per meter squared

• Coulombs per second

What is missing from the Gauss's Law equation on the equation sheet?

• The term for resistance

• The term for electric potential

• The term for magnetic field

• The term for electric flux

How is electric potential difference across a uniform electric field calculated?

• Electric field plus distance

• Electric field divided by distance

• Electric field minus distance

• Electric field times distance

Which expression is not typically found on the equation sheet for energy stored in a capacitor?

• Charge times resistance

• 1/2 charge times electric potential difference

• 1/2 capacitance times electric potential difference squared

• Charge squared over 2 times capacitance

What happens to equivalent resistance when resistors are added in series?

• It decreases

• It remains the same

• It increases

• It becomes zero

What is the time constant for an RC circuit?

• Resistance times capacitance

• Capacitance divided by resistance

• Inductance divided by resistance

• Resistance divided by inductance

What is the angular frequency of an LC circuit?

• Square root of inductance times capacitance

• Multiplicative inverse of the square root of inductance times capacitance

• Inductance divided by capacitance

• Capacitance divided by inductance