Introduction to SAT II Physics

4.. Two resistors, and , are identical, but the potential difference across is half the
potential difference across. What is the ratio of the current in to the current in
?
(A)

(B)

(C) 1

(D) 2

(E) 4

Questions 5 and 6 refer to two identical resistors, arranged in parallel.

5.. If a third identical resistor is added in parallel, what is the ratio of the new equivalent
resistance to the old?
(A)

(B)

(C) 1

(D)

(E)

6.. Assuming the voltage is kept constant, what is the ratio between the new current and the
old current when a third identical resistor is added in parallel with the earlier two?
(A)

(B)

(C) 1

(D)

(E)