Question

Problem 16

Answer 1

Given information

Given the circuit shown below,

  ,  and  are variable resistors

Step-by-step explanation

Step 1.

 

(a) If   increases, the potential difference between A and E stays the same. Assume no resistance in A and  

 

(b) If increases, the potential difference between A and E increases . Assume A and   have resistance.

 

(c) If increases, the voltage drop across   decreases

 

(d) If   decreases, the current through   increases