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 :

# 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 :

1. A

625 W

2. B

1250 W

3. C

6250 W

4. D

zero

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### Solution:

Resistance of device = $\frac{120}{12}=10\mathrm{\Omega }$

Power consumption =

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