Question

The equivalent resistance between A and B in the following figure is
A
(1) 120 Ω
(2) 40 Ω
(3) 30 Ω
(4) 22.5Ω​

Answer 1

Answer:

120 ohms

Explanation:

As they all are connected end to end that is they are in series

Answer 2

$\huge \tt \green {option \: \: (a)20 Ω}$

Step by Step Explanation :-

they are connected in parallel .

$\huge \tt \frac{1}{rp} = \frac{1}{r1} + \frac{1}{r2} + \frac{1}{r3} + \frac{1}{r4}$

$\huge \tt \frac{1}{rp} = \frac{1}{30} + \frac{1}{30} + \frac{1}{30} + \frac{1}{30}$

$\huge \tt\frac{1}{rp} = \frac{1}{120}$

$\huge \tt \blue{ \therefore \: rp = 120Ω}$