answersLogoWhite

0

Why does largest R dissipate more power?

Updated: 4/28/2022
User Avatar

Wiki User

10y ago

Best Answer

That's not always the case. One formula for power dissipated is:

P = IR

So, a higher resistance means that more power is dissipated - if the current is the same. The reason for this is precisely that resistance is related to the conversion of electrical energy into heat.

However, if you put a higher resistance across a specific voltage, you'll get less power dissipation, not more, since less current will flow at a higher resistance.

User Avatar

Wiki User

10y ago
This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: Why does largest R dissipate more power?
Write your answer...
Submit
Still have questions?
magnify glass
imp
Related questions

Reactance is not dissipate energy so why you are calculating in the account of resistance?

While reactive loads do not dissipate the reactive component of the power supply current, these currents are very real. They must be generated, and so must be taken into account when designing the generator. They also flow in the feeder conductors, cause I squared R power losses and heat, and must be taken into account when sizing the conductors.


Why does India have the largest number of diabetes cases?

Because INDIANS r more interested in sweets & even they r sweet:))


How can you work out the power of a resistor?

It depends what you mean by your question. Ohms Law is the key. Power in a resistor is wasted as heat. If a resistor has 1 volt across it and passes a current of 1 amp, it will consume/dissipate one Watt of power ,and must therefore have a resistance of one ohm. To work out the power rating of a resistor required, use V x I = P V is voltage I is current in Amps P is power in Watts R is resistance in ohms V=I X R. I=V/R R=V/I Ohms Law is the fundamental equation of electricity and must be understood before you can go further.


Which sector of organization uses the largest volume of gas in Bangladesh?

Power Development Board (PDB) R. DEV (JnU)


Which wave is the largest in the electrocardiogram?

The largest wave is the R


2 resistors unequal value are in parallel. Would the power dissipated by the resistor with larger ohmic value be greater than the power dissipated by the resistor of lesser value?

No, because the power dissipated in a resistor is proportional to the square of the current through the resistor but only directly proportional to the resistance of the resistor (I^2 * R) and the current through the lower value resistor will be higher than the current through the higher value resistor, the lower value resistor will usually dissipate more power.


What are the cities with the largest population?

Well the top two r New York and Cleveland but there r alot more u can find by Google or bing or ask.


How do you get more power cards?

I think you can get them at toys r us for $2-10


Which artery starts with the letter r?

there are more than one. But off the top of my head... Renal Artery is probably the largest


Does resistance depends upon the dimension?

The basic relation to calculate resistance tells us: R = rho*l/A with R = resistance [Ohm] rho = resistivity [Ohm*meter] l = length [m] A = surface area [m^2] So, the resistance (given a certain resistive material) merely depends on the ratio between the length and the surface area of a resistor. Resisotrs tend to be bigger if they have to dissipate more power, for mor heat needs to be lost.


What is the power dissipated by a resistance of 23ohm connected to a 400v peak to peak square wave source of 150hz?

Most resistors dissipate power as heat for current in any direction, so the frequency becomes irrelevant to this part of the question, but rather how long the circuit is on. The square wave tells me the power is always at 400V for all peaks, question becomes P = E * I = E2/R = watts.


How does the Resistance and Wattage relate to maximum voltage of a wirewound resistor?

The power rating of a resistor is determined by its physical size. The greater its surface area, the better it can dissipate energy, so the higher its power rating. Knowing its power rating and its resistance will determine the maximum voltage that can be applied to it in order to ensure the resulting current doesn't cause the resistor to overheat. This can be determined by manipulating the equation, P = U2/R.