Problems 18–22 refer to Fig. 7-31. In reference to Prob. 19, which direction (C to D or...

Problems 18–22 refer to Fig. 7-31.

In reference to Prob. 19, which direction (C to D or D to C) will electrons flow through M₁ if

a. R _S is reduced in value.

b. R _S is increased in value

.