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ICSE Class 10 Answered

A refeigerator is marked 80W and 220V What is likely to happen if the voltage is reduced to 50V
Asked by lovemaan5500 | 15 Mar, 2018, 07:21: AM
answered-by-expert Expert Answer
If the refregirater power is rated as 80W at 220V, it draws 0.364 A current. 
power = voltage × current; current = power / voltage = 80 / 220 = 0.364 A
 
The resistance is Voltage / current = 220/0.364 = 604 Ω
 
if the voltage drops to 50V, then current drawn = Voltage /resistance = 50/604 = 0.083 A
 
Since rated current is 0.364 A, this small current 0.083 A will not be sufficient to operate the refegirator
Answered by Thiyagarajan K | 15 Mar, 2018, 12:12: PM

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