question_answer 44)

  If the resistance R1 is increased Fig. 9(EP).10 (a), how will the readings of the ammeter nd voltmeter chang?

Answer:

                  Refer Fig. 9(EP). 10 (b),                                 If R1 is increased, I b will decrease Since or, therefore as decreases,  also decreases. Due to it, ammeter reading will decrease. The potential difference across R2 also decreases,  i.e., voltmeter reading also decreases.