Question

In the following circuit,which device is connected in place of AB to increase or decrease the brightness of the bulb?Give reason for your answer

Answer 1

Answer:

in parallel combination

because voltage remain same all over

Answer 2

Answer:

In the given circuit in the given circuit two registers R1 and R2 can be connected, either in the series which reduces the brightness or in the parallel to reduce the effective resistance to increase the brightness in the case total distance rs is equal to R1 + R2 whereas in the second case the total resistance is 1 /RP is equal to 1 /R1+1/R2

Explanation:resistance the flow of current is more in the series connection and less in the parallel connection. Way why use of some materials of different length thickness and why use of different material, enjoy can be used are proportional to l are proportional to 1/A