Q.
An electrical device operates at 12 A current and 120 V dc. it is connected with 250 V and 30 Hz ac. The power consumption will :
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a
625 W
b
1250 W
c
6250 W
d
zero
answer is C.
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Detailed Solution
Resistance of device = 12012=10ΩPower consumption = V2rmsR=250210=6250 W
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