A 3.3 kΩ resistor dissipates 0.25 W. The current is

By Aina Parasher|Updated : July 13th, 2022

A 3.3 kΩ resistor dissipates 0.25 W. The current is-

  1. 8.7 mA
  2. 87 mA
  3. 8.7 µA
  4. 8.7 A

Answer: A. 8.7 mA

A 3.3 kΩ resistor dissipates 0.25 W. the current is 8.7 mA.

Solution

Power loss in a resistor (P) =I2.R

Where, I is the current 

R is the resistance

P is the power loss. Always power loss in a resistor takes place in the form of heat energy.

Given Resistance = 3.3 KΩ

Power loss = 0.25 Watt

0.25=I2×3300  

Current i=√(0.25/3300)=8.7 mA

☛ Related Questions:

 

Comments

write a comment

Follow us for latest updates