Question

A current of 200mA flow through a 4Kohm resistor . What is the potential difference across the resistor

Answer 1

Answer:

800 volts.

Explanation:

Current (I) = 200mA = 0.2A

Resistence (R) = 4×10^3 = 4000ohm

We know that,

Voltage = Current × Resistance

V = 0.2×4000

V = 800

800 volts.

Answer 2

$\bf{\underline{Given}}:-$

• Current (I) = 200 mA

• Resistance (R) = 4 kΩ

Now,

⸕ Convert 200 milliampere into ampere,

• current (I) = 200 mA

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

$\rm\rightarrow\:Current\:(I)=0.2\:ampere$

Then,

⸕ Convert 4 kΩ into Ω

• Resistance (R) = 4 kΩ

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

$\rm\rightarrow\:Resistance\:(R)=4000\:\Omega$

$\bf{\underline{To\:Find}}:-$

• Potential difference accross the resistor

$\bf{\underline{Solution}}:-$

we know that,

$\orange{\bigstar}\:\:{\underline{\boxed{\bf\pink{V=IR}}}}$

$\rm\longrightarrow\:V=0.2\times\:4000$

$\rm\longrightarrow\:V=800\:volt$

Hence,the potential difference accross the resistor will be 800 volt.

$\blue{\bigstar}\:\:{\underline{\boxed{\bf\red{More\:Information}}}}$

➝ Potential difference :- The difference in electric potential between two points is known as potential difference.

• SI unit of potential difference is volt.

• It is measured by an instrument called voltmeter.

• The other name of potential difference is voltage.