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Electric Components - Electric Current & its Effects Video Lecture - Class 7

FAQs on Electric Components - Electric Current & its Effects Video Lecture - Class 7

1. What is electric current and how does it flow in electric components?

Ans. Electric current is the flow of electric charge in a circuit. It is the movement of electrons through a conductor. In electric components, such as wires or resistors, the flow of electric current occurs when there is a potential difference or voltage across the component. The electrons flow from the negative terminal to the positive terminal, creating a closed loop circuit.

2. What are the effects of electric current?

Ans. Electric current can have various effects, such as heating, magnetism, and chemical reactions. When electric current flows through a resistor, it generates heat due to the resistance in the component. Electric current also creates a magnetic field around a wire, which is the principle behind electromagnets. Additionally, electric current can cause chemical reactions, such as electrolysis, where the passage of current leads to the breakdown of substances into their constituent elements.

3. How does the resistance of an electric component affect the flow of electric current?

Ans. The resistance of an electric component affects the flow of electric current by impeding or restricting its flow. A component with higher resistance will limit the flow of current, while a component with lower resistance will allow more current to flow. This relationship is governed by Ohm's Law, which states that the current flowing through a conductor is directly proportional to the voltage across the conductor and inversely proportional to its resistance.

4. Can electric current flow through an open circuit?

Ans. No, electric current cannot flow through an open circuit. An open circuit refers to a break or discontinuity in the path of the current, preventing the flow of electrons. In an open circuit, there is no closed loop for the electrons to move through, so no current can flow. It is necessary to have a complete circuit with a closed loop for electric current to flow.

5. What are some common examples of electric components?

Ans. Some common examples of electric components include resistors, capacitors, inductors, diodes, and transistors. Resistors are used to control the flow of electric current, while capacitors store and release electrical energy. Inductors are used in circuits that require the storage of magnetic energy. Diodes allow current to flow in only one direction, while transistors are used for amplification and switching in electronic circuits. These components are essential building blocks in various electrical and electronic systems.

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Sep 08, 2025 Last updated

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