Question

Two bulbs of 100W and 40W are connected in series. The current through the 100W bulb is 1A. The current through the 40W bulb will be:

• A. $0.4\text{A}$
• B. $0.6\text{A}$
• C. $0.8\text{A}$
• D. $1\text{A}$

Answer 1

The correct option is D

$1\text{A}$

1. When the same current flows through all of the circuit's components, the circuit is said to be connected in series.
2. The current has only one path in such circuits. As an example of a series circuit, consider the household decorative string lights.
3. This is nothing more than a string of tiny bulbs connected in series. If one of the bulbs in a series burns out, none of the others will light up.
4. Therefore, the current through the 40W bulb will be $1\text{A}$ because current remains same in a series circuit.

Hence, Option(D) is correct.