46. 

A circuit has two different voltage sources that are connected in a series-opposing form. If the sources are rated at 6 V and 9 V, what is the total source voltage?

A. 3 V
B. 16 V
C. 7.5 V
D. 8 V
E. None of the above

47. 

The emitter diode is usually

A. Forward-biased
B. Reverse-biased
C. Nonconducting
D. Operating in the breakdwon region
E. None of the above