A refrigerator, when connected to a 240 V mains supply has a maximum power of 100 W. What will be the maximum current for this refrigerator?
Answers
Answer:
Maximum twice day
first we have to find the constant for electrical devices, the resistance. in this case resistance of 100w, 220 V bulb.
equation is resistance R = square of voltage V divided by the rated power P
R=V²/PR=V²/P
we get 484 ohm’s
when we connect this to higher voltage like 240
new power can be calculated by rearranging the equation
P=V²/RP=V²/R
we get new power out put of 119 W, this is higher power this why increase in voltage increase the light out put
but exactly in AC voltage the equations are similar but we consider other factors like
P is the average power in Watts
simple V in Vrms is the rms supply voltage in Volts
Irms is the rms supply current in Amps
R is the resistance of the resistor in Ohm’s (Ω) – should really be Z to indicate impedance
power factor
etc..
don’t have to go for it, the understanding, but there is the power loss come
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