AP Physics C 2017

What Types of Questions Are Asked on the Exam?

The multiple-choice questions tend to focus either on your understanding of concepts or on your mastery
of equations and their meaning. Here’s an example of a “concept” multiple-choice question.

Which   of  the following   is  an  expression  of  conservation    of  charge?

(A)     Kirchoff’s  loop    rule

(B)     Kirchoff’s  junction    rule

(C)     Ohm’s   law

(D)     Snell’s law

(E)     Kinetic theory  of  gases

The answer is B . Kirchoff’s junction rule states that whatever charge comes in must come out. If you
don’t remember Kirchoff’s junction rule, turn to Chapter 19 , Circuits.
And here’s an example of an “equation” multiple-choice question.

If  the separation  between plates  in  a   parallel-plate  capacitor   is  tripled,    what    happens to  the

capacitance?

(A)     It  is  reduced by  a   factor  of  9.

(B)     It  is  reduced by  a   factor  of  3.

(C)     It  remains the same.

(D)     It  increases   by  a   factor  of  3.

(E)     It  increases   by  a   factor  of  9.

The answer is B . For this kind of question, you either remember the equation for the capacitance of a