Manga Guide Questions 90-195

Manga Guide to Electricity Read 90-116
Answer the following on the blog.
What is the relationship between heat and electricity. Please provide a metaphor.
- When current flows through a resistance, the temperature rises and thus heat is created. The book uses a person trying to move through a group of people and bumping into them and not being able to move as easy.
Why is it warm near an incandescent light bulb?

- Because of thermal emission that is created by the visible light emission and thus the temperature rises

What is a superconductor? What are they used for in real life? You may have to look this up. How could one make a metal a superconductor?
When a material's resistance becomes zero. Many researchers are trying to find a way to send electricity to homes everywhere without current loss due to joule heating. You can make a metal a superconductor by making them cold enough to the temperature of absolute zero.
What is Ampere's Law?

When current flows in an electric wire, a magnetic field with a circular pattern in generated around that wire.

If current of the same size flows in the same direction in two electric wires placed side by side, what happens?

The magnetic fields generated in each wire are combined to generate a magnetic field of twice the current around both conductors.

What happens if current of the same size flows in opposite directions in two electric wires placed side by side?
A force of repulsion is generated and the magnetic fields around the wires negate each other and become smaller.



Please skip over Chapter 4 and read Chapter 5 (pp. 156-195) in Manga Guide to Electricity

Please answer the following on the blog:
1. What is an example of a semiconductor device?

Silicon

2. Why is silicon used in the manufacture of semiconductors? 

- The valence electrons are all closely together so when another electron moves through it, it is very difficult. Thus is something with 5 valence electrons come through there is a free electron increasing conductivity

3. Discuss the difference using an example of the difference between and N-type and P-type semiconductor.
- A N-Type semiconductor because the electron which has a negative electrical property, becomes a carrier of electricity. While a P-Type semiconductor because it has a hold which has a positive electrical property, becomes a carrier of electricity.
4. In your own words describe what a diode does and the role of N and P type semiconductors.
A diode only lets current flow in one direction and in order to form this diode a N-Type and a P-Type must be combined. 
5. What is rectification?
-This allows current to flow in only one direction.
6. What causes color in an LED? Give and example of what causes a particular color.

- Because the wavelength of the light emitted depends on the raw material of the semiconductor, various colors of light are created. There are certain crystals that are used to make various colors.

7. What is the relationship between base current and collector current in a transistor?
A base current is the current that flows down the base to the emitter and the collector current is the current that flows from the collector to the emitter. The collector will change significantly even with a small change in base.
8. What are the advantages of a transistor over a switch? 
- It doesn't have physical contact so it doesn't wear out or fail.