RRB ALP Technical Notes for Stage 2 CBT Examination (Part B)
The RRB ALP Technical Notes are designed to help candidates prepare effectively for CBT 2 Part B of the exam. These notes cover all key technical topics in a simple and clear way, making it easier to understand important concepts and boost your exam performance. They're a handy resource for anyone aiming to score well in the RRB ALP technical section.
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To help you prepare better for the RRB ALP CBT 2 Part B exam, we’ve provided topic-wise technical notes in PDF format. These notes cover important subjects such as welding hand tools, Ohm’s Law, Kirchhoff’s Current Law (KCL), and key electrical terms. Each PDF is made to offer clear explanations and help you revise faster. These resources are especially useful for candidates from technical backgrounds. Download the PDFs below and boost your technical preparation.
Download RRB ALP Welding Hand Tools Notes PDF
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Download RRB ALP Ohm's Law PDF
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RRB ALP Technical Notes: Resistivity and Conductivity
The electrical resistance of a wire would be expected to be greater for a longer wire, less for a wire of larger cross-sectional area, and would be expected to depend upon the material out of which the wire is made. Experimentally, the dependence upon these properties is a straightforward one for a wide range of conditions, and the resistance of a wire can be expressed as
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RRB ALP Technical Notes: Types of Resistor
Given below are the RRB ALP Technical Notes on types of resistor:
- Carbon Composition Resistor – Made of carbon dust or graphite paste, low wattage values
- Film or Cermet Resistor – Made from conductive metal oxide paste, very low wattage values
- Wire-wound Resistor – Metallic bodies for heat sink mounting, very high wattage ratings
- Semiconductor Resistor – High frequency/precision surface-mount thin-film technology
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Carbon resistors are made in both composition and film types. Carbon Composition Resistor –
- Made of carbon dust or graphite paste
- low to medium type power resistor
- suffer from noise and stability when hot
RRB ALP Technical Notes: Film Type Carbon Resistors
Given below are the RRB ALP Technical Notes on film type carbon resistors:
- It is made by placing the carbon film or carbon layer on a ceramic substrate
- It has much better temperature stability
- lower noise and are generally better for high frequency or radio frequency applications
- Carbon film resistors have a high negative temperature coefficient of resistance
RRB ALP Technical Notes – Standard Resistor Values and Color
Given below are the RRB ALP Technical Notes on standard resistor values and colour:
Components and wires are coded with colours to identify their value and function.
|
Color |
Digit |
Multiplier |
Tolerance (%) |
|
Black |
0 |
100(1) |
|
|
Brown |
1 |
101 |
1 |
|
Red |
3 |
102 |
2 |
|
Orange |
3 |
103 |
|
|
Yellow |
4 |
104 |
|
|
Green |
6 |
105 |
0.5 |
|
Blue |
7 |
106 |
0.25 |
|
Violet |
8 |
107 |
0.1 |
|
Grey |
9 |
108 |
|
|
White |
109 |
||
|
Gold |
10-1 |
5 |
|
|
Silver |
10-2 |
10 |
|
|
(none) |
20 |
So these were some important RRB ALP Technical Notes on Resistance for Electricians & Wiremen. You can know more about RRB ALP Recruitment by clicking on the links given below!
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