You are given a 400 V 800 W device
a) What is its power at 200 V?
b) What if 600 V is applied?
Pls answer fastly....
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1
Answer:
Resistance of the appliance
R=
P
V
2
=
800
200×200
=50 Ω
Power when connected in 100 V
P=
R
V
2
=
50
100×100
=200 W
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