Question

to get 2 ohm resistance using only 6 ohm resistor the number of them required is a 2 b 3 c 4 d 6​

Answer 1

Answer: 3

Explanation:If I connect 3resistor in parallel then then I will get 2ohm

=> 1/6 + 1/6 + 1/6 = 3/6

=> 1/2=1/R or R=2

Answer 2

Total number of resistors used in the circuit is 3 in order to get 2 ohms equivalent resistance.

Explanation:

In this case, to get 2 ohm resistance using only 6 ohm resistor, we need to find the number of resistors.

When 3 resistors of 6 ohms are connected in parallel, then the equivalent resistance is given by :

$\dfrac{1}{R}=\dfrac{1}{R_1}+\dfrac{1}{R_2}+\dfrac{1}{R_3}$

$\dfrac{1}{R}=\dfrac{1}{6}+\dfrac{1}{6}+\dfrac{1}{6}$

R = 2 ohms

So, total number of resistors used in the circuit is 3 in order to get 2 ohms equivalent resistance.

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