Question

A machine part has a resistor X protruding from an opening in the side. This resistor is connected to three other resistors, as shown in Fig. An ohmmeter connected across a and b reads 2.00 O. What is the resistance of X?

Answer 1

Explanation:

DES 308 Lighting Design Instructor: Julie Peterson Monday, October 10, 2016 Lecture notes WEEK 6 General Lamp Characteristics Part II Filament Incandescent Lamps - Oldest lamp source – 1879 - Heats tungsten filament to light the lamp o Uses argon with nitrogen to prevent arcing – - Efficacy is directly affected with amount of heat produced o 10-15% produces light o 85-90% creates heat - Relatively short life and low efficacy (avg. 10 lm/W) - E

Answer 2

Answer:

The resistance of X is 7.5 $\Omega$.

Explanation:

Step 1: Electrical resistance is a measure of how a substance or equipment restricts the passage of electricity through it. Ohms (Ω) are used to measure resistance. If we compare it to how water flows through pipes, the resistance increases as the pipe gets thinner, which results in a reduction in water flow.

Step 2: The amount that a material or piece of equipment hinders the flow of electricity through it is known as its electrical resistance. Resistance is measured in Ohms (Ω). If we think about how water travels through pipes, as the pipe grows thinner, the water flow decreases because of the increased resistance.

Step 3: According to the concept oof current-elect-recites resistance $10 \pi, 5 \Omega$ and $15 r$ are parallel connection.

$\begin{aligned}\Rightarrow R & =\frac{10 \times 5 * 15}{10 \times 5+5 \times 15+15 \times 10} \\& =\frac{750}{275}=2.73 \Omega\end{aligned}$

$\Rightarrow$ The resistance Rand x ohms are parallel.

$\begin{gathered}\Rightarrow \frac{x \times 2.73}{x+2.73}=R_{\text {total }} . \\\Rightarrow \text { But } R_{\text {total }}=2 \Omega \\\Rightarrow \frac{2.73 x}{x+2.73}=2 \\2.73 x=2 x+2(2.73) \\0.73 x=5.46 . \\x=7.5 \Omega .\end{gathered}$

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