Answered: Using the information provided, find…

Using the information provided, find the unknown quantities. a) Find the Resistor – (R3)? b) Find the Voltages - (E), (V2). (V4)? c) Find the Current – (I)? d) Calculate Total Power – (Pr)?

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter42: Heat Gains And Heat Losses In Structures

Section: Chapter Questions

Problem 10RQ: If the R-value of a construction material is 2.0, what isits U-value? A. 0.25 B. 0 50 C. 1.0 D. 2.0

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Concept explainers

Forced undamped vibrations

In mechanical engineering, vibration is expressed as the term that occurs due to an object's backward and forward movement about a point of equilibrium. Generally, there are three types of vibrations which are,

Question

12)
Using the information provided, find the unknown quantities.
a) Find the Resistor – (R3)?
b) Find the Voltages – (E), (V2), (V4)?
-
c) Find the Current – (I)?
|
d) Calculate Total Power – (PT)?
+ 2V
+ V2
+ 12 V -
-
R2
R3
1 kl
2 k
+
+
R4
3 kΩ V,

Expert Solution

Step 1

Given Data:

The resistors are $R_{1} = 1 kΩ, R_{2} = 2 kΩ and R_{4} = 3 kΩ .$
The potential drops are $V_{1} = 2 V and V_{3} = 12 V .$

As all the four resistors are in the series combination, hence the current through each of the resistors will be the same.

Part (c):

Applying Ohm's law across resistor R₁,

$\begin{array}{rcl} I & = & \frac{V_{1}}{R_{1}} \\ = & \frac{2 V}{1 kΩ \times \frac{1000 Ω}{1 kΩ}} \\ = & 0.002 A . \end{array}$

Thus, the current I is 0.002 A.

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