When linked to a battery, a lightbulb glows brightly. If the battery is reversed and reconnected to the bulb, the bulb will glow..

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...with the exact same brightness--> the lightbulb will certainly glow equally as bright nevertheless of the direction in which existing flows v it
When a battery is connected to a lightbulb properly, existing flows through the lightbulb and makes that glow. Exactly how much existing flows v the battery compared with the lightbulb?
the same amount-->for a single loop, the present is the same at every point in the loop. Therefore, the lot of current that flows through the lightbulb is the exact same as the amount that flows with the battery.
Ohm"s law relates the current through a wire to the voltage throughout the wire--> Ohm"s regulation is one empirical law showing the for some products the existing through the material is proportional come the voltage throughout the material. For other materials, such as diodes, fluorescent lightbulbs, and superconductors, Ohm"s law is no valid. Because it is not valid for all objects, it cannot be a fundamental law of physics.
Electrons carry energy native a battery to a lightbulb. What wake up to the electrons once they reach the lightbulb?
In a lightbulb, electron at higher potential power enter the lightbulb and give off that energy as they pass with the bulb. The number of electrons exiting and entering the pear is the same.
it"s the same at all points--> the present is a measure of the price that electrons happen a offered point. If the present were different at 2 points in the circuit, the electrons would certainly be structure up ( or gift depleted) between these points. The buildup of electrons would cause the circuit to it is in time dependent and not a steady system. The flow of electron (current) should be the exact same at every points in a loop.
When you dual the VOLTAGE across a certain material or device, friend observe that the CURENT boosts by a aspect of 3. What have the right to you conclude?
Ohm"s law is no obeyed in this case.--> Ohm"s legislation requires the the ratio of voltage to current to be constant. Because it is not constant in this case, that does not obey Ohm"s law.
...NEITHER some charge is offered up by the resistor or some existing is supplied up by the resistor.--> The resistor removes energy native the system, such that the electrons amazing the resistor have actually less potential power than the electron entering, but the variety of electrons (charge carriers) entering and exiting the resistor is the same. The price of electron entering and also exiting is same to the consistent current in the circuit.
... An quantity of energy-->kilowatt-hour is the product of the unit of power (kilowatt) and also a unit the time (hour), resulting in a unit of energy
the present becomes as well high--> each an equipment added to the circuit is included in parallel. The voltage across the circuit go not readjust as gadgets are added. Each new device, however, creates a course for additional current to circulation which causes current in the circuit breaker come increase. When present becomes too high, the circuit breaker will open.

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Nothing happens as soon as birds soil on a strength line, however we room warned not to touch a strength line through a ladder. What"s the difference?
There is small to no voltage drop in between the optimal of a ladder poignant the power line and the bottom of the ladder top top the ground.--> for present to flow through one object, the must complete a circuit. As soon as a bird soil on a wire, the bird creates a loop through the segment the wire between its feet. Voltage drop across the bird amounts to voltage drop throughout the wire in between the bird"s feet. Due to the fact that the wire has a tiny resistance, there is small voltage drop throughout the wire between the bird"s feet and little voltage drop across the bird, causing tiny current come flow. Once a ladder is placed between the ground and wire, it creates a course for existing to circulation from the high voltage cable to the soil (zero V). This huge potential distinction will enable a large current to flow through the ladder.
...the electron in the wire space instantly "pushed" by a voltage difference.-->when the move is turned on, the electric potential difference across the circuit creates an electric field in the cable which causes conduction electron to move
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