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fairchildcj59
01.12.2019 •
Physics
If the resistance doubles while the voltage stays the same, what effect will that have on the power?
a.it will increase by a factor of 2.
b.it will decrease by a factor of 2.
c.it will increase by a factor of 4.
d.it will decrease by a factor of 4.
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Ответ:
Power = (voltage)² / R
So Original power = (voltage)² / (original R)
and
New power = (same voltage)² / (2 x original R)
That's equal to (1/2) (voltage)² / (original R)
which is equal to (1/2) (original power) .
So I guess the power decreases by half, and that's choice-B .
Ответ:
D, if there are choices
Step-by-step explanation:
;)