Revision Notes for CBSE Class 7 Science Chapter 14 Electric Current and Its Effects - Free PDF Download
FAQs on Electric Current and Its Effects Class 7 Notes CBSE Science Chapter 14 (Free PDF Download)
1. How Electromagnets Differ from Permanent Magnets?
If you follow the NCERT Class 7 Science Chapter 14 notes, you will learn that the power of permanent magnets cannot be altered whereas electromagnets can be controlled.
2. Why Should you Prefer Using Class 7th Science Chapter 14 Notes?
By using these notes, you can make your revision more efficient and faster to comprehend.
3. How can you Identify a Field Magnetic Caused by an Electric Current?
As per Class 7 Electric Current and Its Effects notes, you will need a magnetic needle to identify a magnetic field and its direction.
4. How does resistance impact electric current flow?
Resistance is a property that opposes the flow of electric current. According to Ohm's Law, the current flowing through a conductor is directly proportional to the voltage across it and inversely proportional to its resistance. Higher resistance reduces the current flow, and lower resistance allows more current to pass through. Understanding resistance is essential in designing circuits and selecting appropriate materials for conductors.
5. What is electric current, and how does it flow in a circuit?
Electric current is the flow of electric charge through a conductor. In a circuit, it flows from the positive terminal of the voltage source (like a battery) to the negative terminal. This flow is facilitated by the movement of electrons in the conductor. Think of it like a continuous loop – electrons move from the negative side of the battery, through the circuit components, and back to the positive side.