When a 20-V Emf Is Placed Across Two Resistors in Series,a

Multiple Choice

When a 20-V emf is placed across two resistors in series,a current of 2.0 A is present in each of the resistors.When the same emf is placed across the same two resistors in parallel,the current through the emf is 10 A.What is the magnitude of the greater of the two resistances?

A) 7.2 $\Omega$
B) 7.6 $\Omega$
C) 6.9 $\Omega$
D) 8.0 $\Omega$
E) 2.8 $\Omega$