When Two Resistors of Resistances $R _ { 1 }$ And $R _ { 2 }$

question 180

Multiple Choice

When two resistors of resistances $R _ { 1 }$ and $R _ { 2 }$ are connected in parallel (see figure) , the total resistance $R$ satisfies the equation $$\frac { 1 } { R } = \frac { 1 } { R _ { 1 } } + \frac { 1 } { R _ { 2 } }$$ . Find $R _ { 1 }$ for a parallel circuit in which $R _ { 2 } = 7$ ohms and R must be at least 1 ohm.

• A) \(R _ { 1 } \leq 7 \text { ohms }\)
• B) \(R _ { 1 } < 7 \text { ohms }\)
• C) \(R _ { 1 } \geq\) \(\frac { 7 } { 6 }\) \(\text { ohms }\)
• D) \(R _ { 1 } > 7 \mathrm { ohms }\)
• E) \(R _ { 1 } =\) \(\frac { 7 } { 6 }\) \(\text { ohms }\)

---

Definitions:

First-in, First-out Method

An inventory valuation method where the first items purchased or produced are the first ones removed from the inventory account.

Equivalent Units

A concept used in cost accounting to convert partially completed goods into a number of completed units for inventory and cost analysis purposes.

Conversion Cost

The combined cost of direct labor and manufacturing overhead, associated with the transformation of raw materials into finished goods.

Equivalent Units

A term used in cost accounting to express the amount of work completed in terms of fully finished units, adjusting for partial completions in the production process.