Question

A current of 200 m/a flows through a 4ohm resistor What is p. d across resistor

Answer 1

Howdy!

your answer is

Given, current I = 200 ma = 200×10^-3a
resistance = 4 ohm

by ohm's law

$v = ir \\ = > v = 200 \times {10}^{ - 3} \times 4 \\ = > v = 8 \times {10}^{ - 1} = 0.8volt$

hope it help you