Question

please help in question no. 13​

Answer 1

Answer:

The Eiffel Tower is the most-visited paid monument in the world; 6.91 million people ascended it in 2015. The tower is 324 metres (1,063 ft) tall, about the same height as an 81-storey building, and the tallest structure in Paris.

Answer 2

Given :

Four resistances of 3Ω are connected as shown in the figure.

To Find :

Equivalent resistance between two points A and B.

Solution :

A] Equivalent resistance of series combination is given by

♦ R = R₁ + R₂ + ... + Rₙ

B] Equivalent resistance of parallel combination is given by

♦ 1/R = 1/R₁ + 1/R₂ + ... + 1/Rₙ

Let's come to the question now!

In right part, three resistances of 3Ω are connected in parallel. So their equivalent resistance will be,

➙ 1/r = 1/3 + 1/3 + 1/3

➙ 1/r = 3/3

➙ r = 3/3

➙ r = 1 Ω

After solving right part, r and 3Ω come in series$.$ So net equivalent resistance of the circuit will be

➠ R = 3 + r

➠ R = 3 + 1

➠ R = 4 Ω

∴ Net equivalent resistance of the circuit is 4Ω.