# 10 Years Manufacturer Miniature circuit breaker-FTB2G for Argentina Factory

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Model: | FTB2G | |

Pole: | 1P,2P,3P,4P | |

Rated frequency: | 50HZ | |

Rated voltage (V): | 230/400 | |

Rated current (A)C,D | 6,10,16,20,25,32,40,50,63 | |

Breaking Capacity： | 6KA | |

Mechanical and electrical life: | 20000 | |

Ambient temperature (°C)： | -5 ~ +40 | |

Altitude (m)： | ≤2000m | |

Relative air humidity： | no more than 95% | |

Pollution degree： | 2 | |

Installation： | Used in place without obvious shock and vibration | |

Pollution Degree： | II | |

Connecting wire(mm²)Min/Max | 1/25 | |

Size（L×W×H） | 1P | 74.2×17.8×80 |

2P | 75.7×35.6×80 | |

3P | 75.7×53.4×80 | |

4P | 75.7×71.2×80 |

Ohm’s Law

You will learn about “Ohm’s Law” in this video. German physicist Georg Simon Ohm stated that the electric current flowing through a metallic wire is directly proportional to the potential difference across its ends, provided its temperature remains the same. This law is called Ohm’s law. Let us verify Ohm’s law with the help of an activity. Take a nichrome wire of about 0.5 m, a milli-ammeter, a voltmeter, a switch and 3 cells of 1.5 volts each. First, let us connect 1 cell with the wire, voltmeter and milli-ammeter. When we pass current through the circuit, we can see that the current is 120 mA (0.12 A) and the potential difference is 0.3 V. Now, connect 2 cells instead of 1 cell. The current through the wire is 200 mA (0.2 A) and the potential difference is 0.5 V. When we connect 3 cells in this circuit, the current is 300 mA (0.3 A) and the potential difference is 0.75 V. Observe all the values together. With increase in number of cells, the values of V and I also increase. However, the ratio of voltage to current is constant in all the readings, i.e. 2.5 V per ampere. Hence, we understand that voltage is directly proportional to current. This verifies the Ohm’s law. The V I graph is a straight line passing through the origin. V is proportional to I or V/I = Constant. This constant is R where R is the resistance of the metallic wire at its given temperature. Hence V/I = R or V = IR.

1 Ohms Law in Urdu

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contents :

Chapter 14: Current Electricity (55 videos)

14:1: Electric Current

1. Introduction to Electric Current

2. More on Introduction to Electric Current

3. Problem-Introduction to Electric Current

4. Problem 1-Measurement of Current

14.2: Conventional current

1. Conventional Current

14.3: Potential Difference and emf

1. Potential Difference

2. Problem-Potential Difference

3. Problem 1-Measurement of Potential Difference

4. Problem- Potential Divider

5. Electromotive Force

6. Problem-Electromotive Force

7. Problem- Measurement of e.m.f

14.4: Ohm’s Law

1. Ohms Law

14.5: Resistance

1. Resistance

2. Problem-Determining the Resistance of a Load

3. Problem- Resistor

14.6: Specific Resistance of Resistivity

1. Specific Resistance

2. Problem 1-Specific Resistance

3. Problem 2-Specific Resistance

14.7: Effect of Temperature on Resistance

1. Effect of Temperature on Resistance

2. Problem 1-Effect of Temperature Upon Resistance

3. Problem 2-Effect of Temperature Upon Resistance

14.8: Combinations of Resistors

1. Series combination of Resistors

2. Problem 1-Series Combination of Resistors

3. Parallel Combination to Resistors

4. More on Parallel Combination to Resistors

5. Problem 2-Series Combination of Resistors

6. Problem-Current in Series Circuit

7. Problem 1-Parallel combination to Resistors

8. Problem 2-Parallel combination to Resistors

9. Problem 3-Parallel combination to Resistors

10. Problem 4-Parallel combination to Resistors

14.9: Conductors and Insulators

1. Conductors and Insulators

14.10: The I-V Characteristics for OHMIC and Non OHMIC Conductors

1. Characteristics of Ohmic and Non Ohmic Conductors

2. Problem-Characteristics of Ohmic and Non Ohmic Conductors

14.11: Electrical Power and joule Law

1. Problem 1-Electrical Energy and Joules law

2. Electrical Energy and Joules law

3. Problem 2-Electrical Energy and Joules law

4. Electric Power

5. Kilowatt Hour

6. Problem 1-Electric Power

7. Problem 2-Electric Power

14.12: Direct Current (D.C) and Alternating Current (A.C)

1. Direct Current

2. Alternating Current

14.13: Circuit Components

1. Circuit Components

14.14: Measuring Instruments

1. Introduction to Galvanometer

2. Introduction to Ammeter

3. Introduction to Voltmeter

14.15: Series and Parallel Circuit

1. Series combination of Resistors

2. Parallel Combination to Resistors

14.16: House Circuit

1. House Wiring

14.17: Electricity Hazards

1. Insulation Damage and Damp Conditions

2. Introduction to Fuse

3. Introduction to Circuit Breaker

4. Introduction to Earth Wire

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