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- Write equations of direct, inverse, joint and combined variation.
- Solve equations using direct, inverse, joint and combined variation.
28. In each electrical circuit, the voltage in a battery is measured in volts, and the resistance in the circuit is measured in ohms. The voltage, V, is directly proportional to the resistance, R. In a given circuit, the voltage is 200 volts when the resistance is 8 ohms. Which of the following represents the equation of variation for this electrical circuit?
A. V=25 R
B. V=1600 R
C. V=25/R
D. V=1600/R

Write equations of direct inverse joint and combined variation Solve equations using direct inverse joint and combined variation 28 In each electrical circuit class=

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Answer:

The equation that represents the variation of the given electrical circuit is A. V=25R

What does proportionality mean?

Proportionality denotes a linear relationship between two quantities or variables. Both quantities increase in size when one double, and both decrease in size when one drops to a tenth of its original value.

Step-by-step explanation:

It is given that Voltage V is directly proportional to Reistance R.

Therefore we can write V=kR, where k is a constant.

It is also given that when R=8, V=200.

We will substitute these values in the relationship equation fpr V,R.

200=8k

⇒k=25.

Therefore the equation is V=25R.

To know more about proportionalities, refer to the link below:

https://brainly.com/question/28413384

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