Question

a current of 200mA flows through a 4kilo
ohm resistor.what is the ptential difference
across the resistor?​

Answer 1

GiveN :-

• Current = 200 mA

• Resistance = 4 kΩ

To FinD :-

• Potential difference across the resistor

SolutioN :-

⸕ Convert 200 milliampere into ampere

$\rm\rightarrow \: Current \: (I) = 200 mA \\ \\ \rm\rightarrow\:Current\:(I)=\dfrac{200}{1000}\:A \\ \\ \rm\rightarrow\:Current\:(I)=0.2\:A$

⸕ Convert 4 kΩ into Ω

$\rightarrow \rm Resistance (R) = 4 \: kΩ \\ \\ \rm\rightarrow\:Resistance\:(R)=4\times\:1000 \\ \\\rm\rightarrow\:Resistance\:(R)=4000\:Ω$

Now potential difference is :

$\large : \implies \boxed{ \bf V = IR} \\ \\ : \implies \sf V = 0.2 \times 4000 \\ \\ : \implies \sf V =800\: v$

Potential difference across resistor is 800 v

Answer 2

Answer:

I = 200mA = 0.2 A

R = 4 x 103ohm = 4000 ohm

We know that

V=IR

V = 0.2 x 4000

V = 800 volt