i REALLY NEED SOME HELP WITH MY PHYSICS HOMEWORK AND i dont know how to find the voltage of a device such as a FRIDGE. IT HAS 250 W and thats all i have now how do u find the volatge is there a rule ALL i can find is V=IR but i havent got r!! HELP!
2006-11-14 02:05:06 · 6 answers · asked by tashnatjuly69 1 in Science & Mathematics ➔ Physics
Please contact your local professional service centre.
Do not scratch your head with V= I X R.
If you still want to do your self, use single phase varioc.
voltage from 0.
Normally Fridge comes with 230 volts input in India,
rest of the world, I don't know.
2006-11-14 02:20:48 · answer #1 · answered by svs power 2 · 0⤊ 1⤋
Ok.
For household appliances like a fridge, which is usually plugged into a power socket, usually receives full mains voltage of 240V, whereby the appliance will work with a certain power e.g. 60W ideally. Power = Current x Voltage = Current^2 x Resistance = Voltage^2 / Resistance. Since you have the power at which the fridge is working, you need either the total resistance of the fridge or current that runs through the fridge to find the voltage applied across the appliance.
Hope this helps=)
2006-11-14 02:13:53 · answer #2 · answered by luv_phy 3 · 0⤊ 0⤋
Read the manual...
Seriously, if it's a fridge built for the U.S. consumer market, it will normally have been designed for operation at 115VAC. A device (load) like a fridge doesn't "have" a voltage, but will be designed to operate with a particular range of voltage input.
BTW, assuming your fridge is US and burns 250W, the current through it would be
250W/115V ~= 2.17A
because power in watts equals volts times amps (W=VA*, the other formula you need to remember)
And since V = IR, the resistance of the fridge would be
115V/2.17A ~= 53 ohms
*Actually the power formula W=VA is more commonly and accurately written as P=EI, just like Ohm's Law is more commonly and accurately written as E=IR rather than V=IR. Ask your teacher
2006-11-14 02:23:36 · answer #3 · answered by Gary H 6 · 1⤊ 0⤋
Voltage is the term used in engineering and on an prevalent basis existence. the astounding term for voltage is ability at a component. Voltage distinction or voltage drop is the version in ability between 2 factors. subsequently use the term ability quite of voltage, and ability distinction quite of voltage drop. Now you will understand each element. =================================== on the subject of Ohm's regulation, till one knows the innovations, observe that ability distinction is the clarification for contemporary and contemporary is the end results of ability distinction. evaluate the two ends of a resistance, A and B. the flair at A (voltage of A) is 12 V and that at B (voltage of B) is likewise 12V. the flair distinction is 0. subsequently there is no contemporary during the resistance. evaluate now that the flair of B is 10V. the flair distinction is 12- 10 = 2V. we are saying that the voltage drop from A to B is 2V, (i.e., the flair distinction is 2V} If the resistance is two Ohm, then as in line with Ohm's regulation the present would be 1A. evaluate now that the flair of B is 6V. The voltage drop (ability distinction is 12 -6 = 6V. observe that the voltage of B is 6V and additionally the voltage drop for the era of AB is likewise 6V. yet they're distinctive. Now the present during the resistance is 6/2 = 3A. contemporary is at as quickly as proportional to the voltage drop. (to no longer the voltage) ======================================... in many the calculations we are worried basically with the voltage drop and not the certainly voltage. subsequently it has substitute right into a custom (nonetheless it is not astounding) to synonymously use the words voltage and voltage drop. ======================================... feedback: you will discover interior the lots of the solutions given above, the term voltage is used. the ordinary answer is replace voltage by potential of ability at a component if it referes ability at a component and replace it by potential of voltage drop or by potential of ability distinction in the event that they refer drop of ability. ======================================...
2016-12-10 08:58:30 · answer #4 · answered by ? 4 · 0⤊ 0⤋
Doesn't matter how many watts. Fridges are plugged into mains sockets and depending on where you are in the world this will supply 110 or 230 irrespective of the type of fridge.
Also at start-up fridges drag something like 10 amps.
2006-11-14 03:03:13 · answer #5 · answered by deflagrated 4 · 0⤊ 0⤋
Another eqn is W = V*I = R*I^2
Still you do need an additional piece of info to find the voltage. Either I or R will do using one or both of these eqations.....
If it's a real fridge, the rated voltage will be on the nameplate somewhere.
2006-11-14 02:15:14 · answer #6 · answered by Steve 7 · 0⤊ 0⤋