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22.08.2019 •
Physics
Connect a pair of lamps in series and you draw current from the connected battery. connect the same lamps in parallel and you drawa) the same current.b) more current.c) less current.d) sometimes more, sometimes less.
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Ответ:
B) more current.
Explanation:
When two lamps are connected in series then we have
now let the two lamps are identical
so we have
now the total resistance of the lamps is given as
now the current in that case is given as
Now when lamps are connected in parallel
net resistance of two lamps is given as
so now we have
so we have
so now the current through the battery will be
So current will be more when two lamps are connected in parallel
Ответ:
Debido al cambio de volumen del gas dentro de la bola cuando se somete a una disminución de la presión y un aumento de la temperatura de la atmósfera.
Explanation:
La ubicación de las fábricas que fabrican las bolas que se encuentra en la costa como se indica en la pregunta es a baja altitud y una región más fría donde la presión atmosférica es más alta
Por lo tanto, la presión en la costa = p₁
La temperatura en la costa = T₁
El volumen de la pelota en la costa = V₁
Las condiciones en una ciudad con mayor altitud y temperatura tienen mayor presión atmosférica y temperatura de la siguiente manera;
La presión en la ciudad = p₂ <p₁
La temperatura en la ciudad = T₂> T₁
El volumen de la pelota en la costa = V₂
Por la ley de gas combinada de tenemos;
Allí el volumen de la pelota en la ciudad estará dado por la relación;
Dado que p₁> p₂ y T₂> T₁, entonces p₁/p₂> 1 y T₂/T₁> 1 y tenemos;
V₂ = V₁ × p₁/p₂ × T₂/T₁ = V₁ × X, donde X = p₁/p₂ × T₂/T₁> 1
V₂ = V₁ × X (> 1)
Por lo tanto, V₂> V₁ y el volumen ocupado por el gas aumenta cuando la pelota llega a la ciudad y la pelota está más firme.