Question

In the figure given, the electric current flowing through the 5Ω resistor is 'x' mA. The value of x to the nearest integer is ______.

Options

• 2

• 3

• 4

• 5

Answer 1

In the figure given, the electric current flowing through the 5Ω resistor is 'x' mA. The value of x to the nearest integer is 3.

Explanation:

All 3 kΩ are in parallel so,

`1/"R"_1 = 1/3+1/3+1/3=3/3` kΩ 

R₁ = 1 kΩ 

R_eq = 1 kΩ  + 5 kΩ + 1 kΩ  ⇒ 7 kΩ 

So, I = `21/7000` ⇒  3 mA

x = 3