The equivalent resistance are (i) 3 ohms (ii) 5.5 ohms (iii) 7.5 ohms (iv) 9.5 ohms | Bzziii

The equivalent resistance 

(i) 3 ohms 
(ii) 5.5 ohms 
(iii) 7.5 ohms 
(iv) 9.5 ohms 

(iii) 7.5 ohms 

Explanation:


3Ω & 6Ω are in parallel.

So, 

=`"R"_{1}`=`\frac{3\times6}{3+6}`

=`\frac{18}{9}`

= 2Ω

Now, R1 and 8Ω in series

So,

Rep = `\frac{"R"_{2}\times30}{"R"_{2}+30}`

= `\frac{10\times30}{10+30}`

= `300/40` = `30/4`

= `15/2` = 7.5Ω

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CBSE Class 12 Physics Sample Paper-2022