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What is Electric Current? (Ohm's Law, Resistance & Power) Video Lecture | Physics for Class 10

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FAQs on What is Electric Current? (Ohm's Law, Resistance & Power) Video Lecture - Physics for Class 10

1. What is electric current?
Ans. Electric current refers to the flow of electric charge in a circuit. It is the rate of flow of charge through a conductor and is measured in amperes (A).
2. What is Ohm's law?
Ans. Ohm's law states that the current passing through a conductor between two points is directly proportional to the voltage across the two points, provided the temperature and other physical conditions remain constant. Mathematically, it can be expressed as I = V/R, where I is the current, V is the voltage, and R is the resistance of the conductor.
3. What is resistance?
Ans. Resistance is the property of a conductor that resists the flow of electric current through it. It is measured in ohms (Ω) and is determined by the characteristics of the conductor, including its length, cross-sectional area, and material.
4. What is power?
Ans. Power is the rate at which work is done or energy is transferred. In an electric circuit, it is the product of current and voltage and is measured in watts (W). Mathematically, it can be expressed as P = VI, where P is power, V is voltage, and I is current.
5. What is the significance of Ohm's law in electrical circuits?
Ans. Ohm's law is significant in electrical circuits as it helps in calculating the current and voltage across various components of the circuit. It also helps in determining the resistance needed to limit the current in a circuit and prevent damage to the components. Additionally, it is used in designing and analyzing electrical circuits and in troubleshooting problems in existing circuits.
23 videos|67 docs|58 tests
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