Understanding Power Dissipation in Parallel Resistors

  • Context: High School 
  • Thread starter Thread starter IDGAF
  • Start date Start date
  • Tags Tags
    Resistor
Click For Summary
SUMMARY

The discussion clarifies the power dissipation capabilities of resistors in parallel configurations. When ten 100-ohm, 5-watt resistors are connected in parallel, they create a total resistance of 10 ohms and can collectively handle 50 watts of power dissipation. Each resistor shares the current load, allowing for effective power distribution among them. This confirms that the total power handling is indeed the sum of the individual resistors' ratings.

PREREQUISITES
  • Understanding of Ohm's Law
  • Basic knowledge of electrical resistance
  • Familiarity with power calculations (P=IE)
  • Concept of parallel resistor configurations
NEXT STEPS
  • Study the implications of resistor power ratings in parallel circuits
  • Learn about series vs. parallel resistor configurations
  • Explore advanced power dissipation calculations for mixed resistor networks
  • Investigate the thermal management of resistors in high-power applications
USEFUL FOR

Electrical engineering students, hobbyists working with circuits, and professionals designing power distribution systems will benefit from this discussion.

IDGAF
Messages
1
Reaction score
0
Ok, I'm not an EE student, nor do I really understand all of the P=IE^2 stuff concerning power and resistance, etc.

My question is regarding the power dissipation abilities of resistors in paralell. Let's say I have (10) 100ohm/5w resistors in paralell. Would this effectively be a 10ohm load with 50w of power dissipation? Do the collective resistors share the power handling duties? Or am I way off?

Any insight (in layman's terms) would be much appreciated.
 
Physics news on Phys.org
Yes.


When in parallel each resistor handles a part of the current. 1/Rtotal = 1/R1 + 1/R2 + ...

So for 10 100R resistors you get a net resistance of 10R. Each resistor contributes to the total wattage. If each resistor is 5W then you have a total of 50W.
 

Similar threads

High School Understanding the Relationship Between Power, Voltage, Current, and Resistance
  • · Replies 13 ·
Replies
13
Views
7K
Joule heating effect - qualitative explanation
  • · Replies 8 ·
Replies
8
Views
2K
Maximum Power dissipated at load resistor
  • · Replies 3 ·
Replies
3
Views
1K
Active power dissipated by a resistor from DC to RF
  • · Replies 5 ·
Replies
5
Views
2K
How Does Adding a Resistor Affect Power Dissipation in a Parallel Circuit?
  • · Replies 9 ·
Replies
9
Views
3K
How Do You Determine the Load Resistor Value for Maximum Power Dissipation?
  • · Replies 25 ·
Replies
25
Views
4K
Power dissipated by a resistor in parallel
  • · Replies 6 ·
Replies
6
Views
8K
High School Confused about the need for passive sign conventions in sources
  • · Replies 20 ·
Replies
20
Views
3K
Combining Resistors for 5W Dissipation in 10 Ohms
  • · Replies 4 ·
Replies
4
Views
3K
Graduate Power dissipation in parallel circuit
  • · Replies 31 ·
2
Replies
31
Views
14K