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As a vehicle has four parking lights all connected in parallel and one of the bulbs burns out. Technician B says that it would decrease the current in the circuit is correct .
What is Effect of Adding Parallel Resistance?
You can see that adding any amount of parallel resistance will always result in a lower equivalent resistance by looking at the formula we use to determine the equivalent resistance of a parallel network. The resistance of the entire network will decrease even if a very big parallel resistance is added. The equivalent resistance of a parallel network will, therefore, always be lower than the network's weakest individual resistance.
Initially, this could sound illogical, but if you consider it in this manner, it makes sense: Any amount of resistance that you link between two nodes will permit some current to pass via this new branch, at the very least. When you "add" resistance, you really open up a new path for current, and a rise in total current is accompanied by a fall in total resistance.
What do you mean by amount of charges?
The amount of charge flowing across a circuit in one unit of time is known as the current. Charge doesn't ever start to build up and accumulate to the point where one site's current exceeds that of other sites. Resistors don't lose charge in a way that alters the current density from one place to the next. In a parallel circuit, charge divides into distinct branches, allowing one branch to carry more current than the other. The total current in each branch, however, equals the total current in all other locations when all the branches are added together.
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A vehicle has four parking lights all connected in parallel and one of the bulbs burns out. Technician A says that this could cause the parking light fuse to blow (open)."Neither technician is correct. Option D
What is the Technicians' Hypothesis?
A parallel circuit is a circuit where the components are connected along different paths, so the current can split and flow through each branch. In a parallel circuit, the voltage across each component is the same, but the current through each component may vary depending on the resistance. The total current in a parallel circuit is equal to the sum of the currents through each branch.
If one of the bulbs in a parallel circuit burns out, it means that the current through that branch is zero, and the resistance is infinite.
This does not affect the voltage across the other branches, nor the current through them. Therefore, the total current in the circuit is reduced by the amount of current that was flowing through the burned-out bulb.
This does not cause the fuse to blow, because the fuse is designed to protect the circuit from excessive current, not from the reduced current. In fact, the reduced current may prolong the life of the fuse and the other bulbs.
Technician A is incorrect because a burned-out bulb in a parallel circuit does not cause the fuse to blow. Technician B is incorrect because it would decrease the current in the circuit, not in the branch. The current in the branch with the burned-out bulb is zero, but the current in the other branches is unchanged."
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