U     Integrated circuit packages.    

F      Fuse.   

C     Capacitor.

Z      Miscellaneous.

R      Resistor.

D      Diode.

Q      Transistor.

J       Connector.

T      Transformer. 

G      Generator.

L       Coil.

B       Motor.

Coil:

It reduce the size of device.It reduces the resistance when charge increases.

What does the PCB contains?

Capacitors, resistors or some active devices.

What is meant by Capacitor?

It is used to store Electrical energy.

Does Capacitor and battery are same because they store energy?

No. Because the battery stores chemical energy.

Capacitor stores Electrical energy.

What is meant by Resistor?

It limits the flow of current.

Does Resistor and Regulator are same?

No. Regulator has a constant flow of current.

Resistor limits the flow of current.

How many color bands does resistors have?

Three, four, five and six bands.

How to identify the Resistance value by using Resistors?

In every resistor the last two are used for multiplier and tolerance. And the remaining are digits.

Does Resistor have any positive or negative terminals?

No.

How to know which color is first?

The first digit is used to be in between zero to nine.

What are the colors of resistors?



The device will not be damaged by conducting reverse current. And it allows both direction current flow.
Whereas in diode it will not allow both direction and it will be damaged.

How can the Zener diode be in both direction?

Because they change in the doping.

PCB in CPU: