Introduction to SAT II Physics

7.. How much heat is produced in a 5 resistor in 10 s when a current of 2 A flows through
it?
(A)2 J
(B)10 J
(C)20 J
(D)100 J
(E)200 J
8.. Two identical capacitors are arranged in a circuit. What is the ratio of the equivalent
capacitance of the circuit when the capacitors are in series to that when they are in
parallel?
(A)

(B)

(C) 1

(D) 2

(E) 4

9.. A potential difference of exists between two plates of a parallel-plate capacitor with

capacitance C. A dielectric with a dielectric constant of is then placed between the

plates of the capacitor. What is the energy stored in the capacitor?

(A)

(C/ )( )^2

(B)

( /C)( )^2

(C)

C( )^2

(D)

C

(E)

(C/ )