Question۱ - علت حرکت الکترونها هنگام ایجاد اختلاف پتانسیل در سیم چیست؟
-۲- شرط ایجاد جریان الکتریکی بین دو نقطه چیست؟
۴
Studdy Solution
STEP 1
What is this asking?
This is asking about what causes electrons to move in a wire and what's needed for electrical current to flow.
Watch out!
Don't mix up voltage and current!
Voltage is the *potential* for current to flow, while current is the actual flow of charge.
STEP 2
1. Electron Movement
2. Conditions for Current
STEP 3
Alright, imagine a wire like a water slide, and the electrons are like excited puppies ready to slide down!
The difference in electrical potential, also known as **voltage**, is like the height of the slide.
The higher the slide (the bigger the voltage), the more "oomph" the puppies have to slide down (the more the electrons want to move)!
STEP 4
So, what creates this "height" or voltage?
It's the difference in electrical potential energy between two points.
Think of one end of the wire as the top of the slide and the other end as the bottom.
When there's a difference in electrical potential, it creates an **electric field**, which is like an invisible force that pushes the electrons along the wire, just like gravity pulls the puppies down the slide!
STEP 5
Now, for current to flow, we need a few key ingredients.
First, we need those **free electrons**, our excited puppies, ready to move.
These are electrons that aren't tightly bound to atoms and can roam around.
Conductors, like metals, have lots of these free electrons, making them great for carrying current.
STEP 6
Second, we need that **voltage**, the "height" of our water slide.
No voltage, no push, no flow!
It's like a flat water slide – the puppies won't go anywhere.
STEP 7
Finally, we need a **closed circuit**, a complete path for the electrons to flow through.
Think of it as a continuous loop on the water slide.
If the slide ends in mid-air, the puppies won't slide!
Similarly, if there's a break in the wire, the electrons can't flow, and there's no current.
STEP 8
Electrons move in a wire due to a difference in electrical potential, which creates an electric field.
For electric current to flow, we need: 1) free electrons, 2) a voltage difference, and 3) a closed circuit.
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