Chapter 26, Problem 16Q

Given the circuit shown in Fig. 26–34, use the words “increases,” “decreases,” or “stays the same” to complete the following statements:

(a)    If R₇ increases, the potential difference between A and E _____. Assume no resistance in Ⓐ and $\mathcal{E}$.

(b)    If R₇ increases, the potential difference between A and E _____. Assume Ⓐ and $\mathcal{E}$ have resistance.

(c)    If R₇ increases, the voltage drop across R₄ __________.

(d)    If R₂ decreases, the current through R₁ __________.

(e)    If R₂ decreases, the current through R₆ __________.

(f)    If R₂ decreases, the current through R₆ _____.

(g)    If R₅ increases, the voltage drop across R₂ _____.

(h)    If R₅, increases, the voltage drop across R₄ _____.

(i)    If R₂, R₅, and R₇ increase. $\mathcal{E}(r=0)$ _____.

FIGURE 26–34 Question 15. R₂. R₅, and R₇ are variable resistors (you can change their resistance), given the symbol .