Question:
Some electric bulbs are connected in series across a $ 220\,V $ supply in a room. If one bulb is fused, then remaining bulbs are connected again in series across the same supply. The illumination in the room will be
Some electric bulbs are connected in series across a $ 220\,V $ supply in a room. If one bulb is fused, then remaining bulbs are connected again in series across the same supply. The illumination in the room will be
Updated On: Jun 2, 2024
- increase
- decrease
- remain the same
- not continuous
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The Correct Option is A
Solution and Explanation
From Joule's law, the heat produced is given by $P=\frac{V^{2}}{R}$ where $V$ is potential and $R$ the resistance. When one bulb is fused, the total resistance of the circuit decreases.
Hence, $(P)$ illumination increases.
Hence, $(P)$ illumination increases.
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Concepts Used:
Electric Current
Defining Electric Current
It is the rate of flow of electrons in a conductor. SI Unit - Ampere (A).
Electrons are negatively charged particles hence when they move a number of charges moves.
Note:- The ability of a particular substance to conduct electricity depends on the number of electrons that are able to move . Some of the materials allow current to flow better than others.
What is an Electromotive Force?
If a force acts on electrons to make them move in a particular direction, then up to some extent random motion of the electrons will be eliminated. An overall movement in one direction. The force which acts on the electrons to move them in a certain direction is known as electromotive force and its quantity is known as voltage and is measured in V.