Question

When a high resistance voltmeter is connected directly across a resistor its
reading is 2 V. An electric cell is sending the current of 0.4 A. in the
electric circuit in which theostat is also connected to vary the current.
a. Draw the labeled circuit diagram for the above data
b. Find the resistance of the resistor.
c. Name and state the law applicable in it.
d. Justify the nature of V-I graph in such cases​

Answer 1

Answer:

b v 2v ,I 0.4A

v==ir

2=0.4r

2÷0.4=r

r=5

c ohm law

i.e the potential difference is directly propotional to the current flowing through it.

d uniform