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Introduction to Current Electricity Video Lecture - JEE

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FAQs on Introduction to Current Electricity Video Lecture - JEE

1. What is current electricity?
Ans. Current electricity is the flow of electric charge in a conducting medium, such as wires, due to the movement of electrons. It is caused by the difference in electric potential between two points, and it is commonly used to power electrical devices.
2. What is the difference between current electricity and static electricity?
Ans. The main difference between current electricity and static electricity is that current electricity involves the continuous flow of electric charge, while static electricity involves the buildup and discharge of electric charge in an object. Current electricity is used to power electrical devices, while static electricity can cause shock or attract objects.
3. How is current measured in a circuit?
Ans. Current is measured in a circuit using an ammeter. The ammeter is connected in series with the circuit, and it measures the flow of electric charge, which is the current, in amperes (A). The ammeter should be connected in such a way that the current passes through it.
4. What is Ohm's law and how is it related to current electricity?
Ans. Ohm's law states that the current flowing through a conductor is directly proportional to the voltage applied across it and inversely proportional to its resistance. Mathematically, it can be represented as I = V/R, where I is the current, V is the voltage, and R is the resistance. Ohm's law is fundamental in understanding and analyzing current electricity circuits.
5. What are the factors that affect the resistance of a conductor?
Ans. The resistance of a conductor depends on several factors, including its length, cross-sectional area, material, and temperature. Generally, longer conductors have higher resistance, while conductors with larger cross-sectional areas have lower resistance. Different materials have different resistivities, which affect the resistance. Additionally, the resistance of most conductors increases with temperature.
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