Question

занальний опір 4 однакових ламп ввімкнених паралельно дорівнює 75 Ом. Чому дорівнює опір однієї лампи​

Answer 1

Ответ: 300 Ом

Объяснение:

Дано:

R=75 Ом

R1=R2=R3=R4=R

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R-?

При параллельном соединении общее сопротивление цепи находим по формуле:

1/R+1/R1+1/R2+/R3+/R1=(1/R)=4/R

Подставим числовые значения и получим:

1/75=4/R

R=75*4=300 Ом

Answer 2

Calculation of Resistance

To find the resistance of a single lamp, we can use the formula for resistors connected in parallel. When resistors are connected in parallel, the total resistance is given by the reciprocal of the sum of the reciprocals of the individual resistances.

Let's assume the resistance of each lamp is R.

Given that there are 4 lamps connected in parallel and the total resistance is 75 Ω, we can set up the equation as follows:

1/R + 1/R + 1/R + 1/R = 1/75

Simplifying the equation, we get:

4/R = 1/75

To find the resistance of a single lamp, we can multiply both sides of the equation by R/4:

R/4 * 4/R = (1/75) * (R/4)

Simplifying further, we get:

1 = R/300

Multiplying both sides of the equation by 300, we find:

300 = R

Therefore, the resistance of a single lamp is 300 Ω.