Question

Two resistors 10ohm and 40ohm are connected first in series , and then in parallel. Which type of combination will give less effective resistance? justify

Answer 1

Answer:

when connected in parellel. = 10*40 / 10 +40 = 400 / 50 = 8

series = 10 + 40 = 50

Explanation:

Answer 2

Answer:

The connection in series gives less effective resistance

Explanation:

The equivalent resistance in a serial connection is calculated as thus:

$R_{e q}=R_{1}+R_{2}=10+40=50 ohm$

The equivalent resistance in a parallel connection is calculated as thus:

$\frac{1}{R_{e q}}=\frac{1}{R_{1}}+\frac{1}{R_{2}}=\frac{1}{10}+\frac{1}{40}$

$R_{e q}=8 \mathrm{ohm}$

Resistance of a material is described as how much the material resist the flow of current. If the connection has a high current it means the current flow is low. However, low resistance means high current flow.

The series connection has a high equivalent resistance as compared to the parallel connection. A high resistance can be caused by damaged conductors. It is important to note that a very low resistance is undesirable as well. It is caused by damaged insulators that overheated.