Question

The current flowing through a resistor connected in a electrical circuit and the potential difference developed across it's end are shown in given ammeter and voltmeter find least count Of them

Answer 1

since

V=IR

R=V/I

then R= 2.1/0.3

R=7ohm

I hope this answer will help you

Answer 2

Answer:

LC of ammeter =  0.2 / 10

= > 0.02 A

A = 0.02 A

LC of Voltmeter =  1 / 10

= > 0.1 V

V = 0.1 V

Current = 15 x 0.02 A = 0.3 A

Potential difference = 21 x 0.1 V = 2.1 V