Four lamps are connected in the way as shown in figure. When switch S2 is open and switch S1 is on position- 2, Lamp- B2 is the brightest, and lamp B3 and lamp B4 are the dimmest and are of the same brightness. Now switch S2 is closed and S1 is on position- 1, the descending order of brightness of bulbs is

Question

Four lamps are connected in the way as shown in figure. When switch S2 is open and switch S1 is on position- 2, Lamp- B2 is the brightest, and lamp B3 and lamp B4 are the dimmest and are of the same brightness. Now switch S2 is closed and S1 is on position- 1, the descending order of brightness of bulbs is <img class="img-fluid question-image" alt="Question" src="https://cdn.tardigrade.in/q/nta/p-p2xmaxwlvl16ftcb.jpg" /> (A) B2,B1,B3,B4 (B) B1,B2,B3,B4 (C) B4,B3,B2,B1 (D) B1,B4,B3,B2

Tardigrade Admin · Accepted Answer

⇒ R2>R1>R3=R4 Solution

⇒ Order of brightness B1>B4>B3>B2

$B_{2}, B_{1}, B_{3}, B_{4}$

$B_{1}, B_{2}, B_{3}, B_{4}$

$B_{4}, B_{3}, B_{2}, B_{1}$

$B_{1}, B_{4}, B_{3}, B_{2}$

$\Rightarrow R_{2} > R_{1} > R_{3} = R_{4}$

$\Rightarrow$ Order of brightness $B_{1} > B_{4} > B_{3} > B_{2}$

B2​,B1​,B3​,B4​

B1​,B2​,B3​,B4​

B4​,B3​,B2​,B1​

B1​,B4​,B3​,B2​

⇒R2​>R1​>R3​=R4​ ⇒ Order of brightness B1​>B4​>B3​>B2​

$B_{2}, B_{1}, B_{3}, B_{4}$

$B_{1}, B_{2}, B_{3}, B_{4}$

$B_{4}, B_{3}, B_{2}, B_{1}$

$B_{1}, B_{4}, B_{3}, B_{2}$

$\Rightarrow R_{2} > R_{1} > R_{3} = R_{4}$

$\Rightarrow$ Order of brightness $B_{1} > B_{4} > B_{3} > B_{2}$