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What effect does adding devices have on the resistance of a series circuit?
Many circuits have safety devices such as fuse. A fuse contains a substance that melts if it gets hot. if a short circuit happens, the heat causes the fuse to melt. The circuit is broken. because the current stops ,no damage is done.
What is the difference between parallel and series circuits?
A series circuit is one in which the current must pass through all the electrical devices in the circuit in turn. A parallel circuit is one in which the current passes through each electrical device on the circuit following separate, independent path from all other devices on the circuit, one for each electrical device.
Why is circuit current reduced when a capacitors added to the circuit?
In the case of an a.c. circuit, capacitors oppose current because of their capactive reactance, expressed in ohms. Capacitive reactance is inversely-proportional to the capacitance of the capactor and to the frequency of the supply. So, adding a capacitor is series with an existing load will reduce the load current. On the other hand, adding a capacitor in parallel with an existing load will decrease the load current.
What is Ohm's law?
a law stating that electric current is proportional to voltage and inversely proportional to resistance.
What is salt bridge and give its function in a galvanic cell?
Salt bridge is a U-shaped tube contains a gel permeated with a solution of an inert electrolyte such as Na2SO4. The ions of the inert electrolyte do not react with the other ions in the solutions and they are not oxidised or reduced at the electrodes. The salt bridge is necessary to complete the electrical circuit and to maintain the electrical neutrality in both compartments (by flow of ions).
What happens with electric current when applying the same voltage the resistance of the circuit is reduced?
As the resistance is reduced across the same voltage, the current increases.
When resistance decreases what happens to current?
Based on the simplest Electrical Equation V = I * R,(reads: voltage equals current multiplied by resistance)then, rearranged I = V / R .As resistance decreases, current flow proportionately increases
What circuit fault allows current to flow but at a reduced rate?
A partial short circuit can allow current to flow at a reduced rate. This happens when there is a partial break in the circuit that does not completely prevent current flow but results in higher resistance and lower current flow than normal.
How does added resistance affect the brightness of the bulb?
Added resistance in a circuit will decrease the current flowing through the circuit, resulting in a decrease in the brightness of the bulb. This is because the bulb's brightness is directly proportional to the current passing through it. More resistance means less current, which leads to reduced brightness.
What happens when one bulb is added to a series circuit?
The resistance is increased, the voltage across each bulb is decreased and the current through the circuit is reduced.
Why reducing current in circuit?
The current in a circuit is reduced to prevent the circuit from over load.
If you doubled the load resistor in a wheatstone bridge. the load current would not be half as much Why not?
Because by increasing the load resistance, the total circuit resistance is reduced. This means with less resistance, there is more current drawn from the source. Doubling the size of a load resistor increases the load current.
What is a voltage drop and how does it affect electrical circuits?
A voltage drop is the decrease in electrical potential that occurs when current flows through a component in a circuit. This can happen due to resistance in the component, wires, or connections. Voltage drops can lead to reduced power and efficiency in electrical circuits, affecting the performance of devices and potentially causing malfunctions.
In a electrical circuit when using a capacitor why is the current reduced?
hai when u close capacitor that time voltage and frequency incresing that time current is reducing. thank u sir.
How does resistance affect the brightness of the bulb?
Increasing resistance in a circuit will decrease the current flowing through the bulb, resulting in reduced brightness. This is because the resistance restricts the flow of electrons and diminishes the amount of energy reaching the bulb to produce light.
What would happen if you reduced the resistance in a circut?
current will increase
What happens to the current flowing in a circuit if its resistance is doubled?
Using Ohms Law: V = I x R, where V (Voltage), I (Current), and R (Resistance). re-arranging: V/R = I Therefore if you double both the Voltage and the Resistance, the current remains unchanged.Current = Voltage / Resistance. If both resistance and voltage double the current remains the same.
