Question

please tell me the detail solution of this question.​

Answer 1

Answer:

( d ) 10 m v............

Answer 2

Given:-

total potential difference=10V

potential difference across R,

v=iR

R=v/i

R=4/i

total resistance=R+2000

$total \: resistance = \frac{4}{i} + 2000$

$total \: resistance = \frac{4 + 2000i}{i} \: ohm$

now,

$i = \frac{</strong><strong>V</strong><strong>}{R}$

$i = \frac{10 \times i}{4 + 2000i}$

$1 = \frac{10}{4 + 2000i}$

$4 + 2000i = 10$

$i = \frac{6}{2000}$

$i = 3 \times {10}^{ - 3} ampere$

power across R,

$p = v_{r}i$

$p = 4 \times 3 \times {10}^{ - 3}$

$p = 12 \times {10}^{ - 3} w$

$p = 12 \: mw$

so,

option (c) is correct