Electronics 1 Revision Sheet PDF

ELECTRONICS 1 REVISION SHEET Introduction to electronics ( systems and resistors) 1- Simple electronic system consists of: A. Input …. which is … Usually is the power source feeding the circuit, it differs from a system to another system according to the requirements of that specific ele...

ELECTRONICS 1 REVISION SHEET Introduction to electronics ( systems and resistors) 1- Simple electronic system consists of: A. Input …. which is … Usually is the power source feeding the circuit, it differs from a system to another system according to the requirements of that specific electronic system. B. Process...which is … the purpose of the system, why was it made, and what is the desired output from it... C. Output ….which is … the result of using the electronic system, the outcomes and the benefits of using the electronic system. 2- Identify the simple electronic system components for the below circuit: (Battery – Resistor – LED – Switch) 3- Electronics parts can be classified according to: ……. Shape....…,…Marking on the board……,…Printed information on the electronic part…….. 4- parts with polarity are: …… are the parts designed to have electronic poles, should be connected according to it and not otherwise. 5- Parts with no polarity are: …… parts does not require a specific direction of installation.…… 6 - If we can fit the pins of electronic part on an electronic board it means that it is connected properly [………….] True/False Why? (False) We should also mind the polarity of the electronic component. 7- Mention one simple electronic circuit in your surrounding environment and analyze the system components per your perspective. (Ceiling lamp) (Power source – Switch - Lamp)  8- State whether these readings are correct or not.why? 1 2 3 1- The reading of the voltmeter will not be 9v as the voltmeter positive probe is connected to the negative side of the battery so the reading will be -9v dc. 2- The reading of the voltmeter is 0V DC because there is a short circuit. 3- The reading of the voltmeter is 9V DC. Resistors are …electronic components which have a specific, never-changing electrical resistance. Resistors functions are: limit current … divide voltages…,…and pull-up I/O lines… Two main classifications for resistors …Linear and Non-linear resistors. The symbol for resistor on a circuit diagram is ……  A carbon composite resistor is…Is a type of fixed resistor that reduces or restricts the electric current flow to a certain level. Resistance of a carbon composite resistor depend on …amount of carbon added.,… length of solid cylindrical rod..,… The cross sectional area of the solid cylindrical rod Advantages of a carbon composite resistor …ability to withstand at high energy pulses.., cost of carbon composition resistor is low. Disadvantages of a carbon composite resistor …Poor stability…….,…Low accuracy… Two applications for a carbon composite resistor protection of circuits ….,…current limiting.. Values of a carbon composite Resistor cannot be printed on its body because …too small to have the resistance value printed…… Value of a carbon composite resistor is determined by bands of color are used to represent the resistance value Identify the type of resistor for below: Potentiometer Photo resistor SMD resistor  Resistor network Carbon resistor fusible r  Give the value of the following carbon composite resistors ,mention the tolerance rate: Orange Orange Silver White Gold Violet Red Black Red 23G Ω tolerance ±10% G=109 237 Ω tolerance ± 5% Brown Orange Brown Violet Black Gold Red Black Red Blue 136 Ω tolerance ± 1% 227 Ω tolerance ± 5% Give the value of the following SMD resistors : 470 115 222 102 47 Ω 1.1 MΩ 2.2 KΩ 1 KΩ 1- SMD resistors are …very small rectangular shaped metal oxide film resistors designed to be soldered directly onto the surface… 2- Do SMD resistor have polarity??? No 3- The third digit printed on the resistor stands for …the multiplier… 4- The first two digits printed on the resistor stands for …the first two numbers of the resistance….