Electromagnetic Induction in Daily Life — Flashcards
Kerala Board · Class 10 · Physics
20 flashcards for Electromagnetic Induction in Daily Life (Kerala Board Class 10 Physics) to test yourself on key terms and facts.
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What is electromagnetic induction?
Answer
The phenomenon of inducing an emf (electromotive force) across a conductor due to a change in the magnetic flux linked with the conductor. Discovered by Michael Faraday, it shows that electricity can …
Under what conditions does electromagnetic induction occur?
Answer
Electromagnetic induction occurs when there is relative motion between a conductor and a magnetic field, or when the magnetic flux linked with a closed circuit changes. The conductor and magnet must b…
List three ways to increase the induced emf and current in electromagnetic induction.
Answer
1. Increase the number of turns per unit length in the coil 2. Use a stronger magnet (increase magnetic field strength) 3. Increase the speed of relative motion between the conductor and magnet…
What is the difference between AC and DC current?
Answer
DC (Direct Current): Current that flows only in one direction, like current from a battery. AC (Alternating Current): Current that continuously changes direction at regular intervals of time, like cur…
What is a generator and what energy transformation occurs in it?
Answer
A generator is a device that converts mechanical energy into electrical energy based on the principle of electromagnetic induction. Energy transformation: Mechanical energy → Electrical energy. When w…
What are the main parts of an AC generator?
Answer
1. Field magnet (NS) - provides magnetic field 2. Armature coil (ABCD) - rotates in the magnetic field 3. Slip rings (B₁, B₂) - maintain electrical contact 4. Brushes (R₁, R₂) - transfer current to ex…
What is the key difference between AC and DC generators in terms of construction?
Answer
AC Generator: Uses slip rings and brushes to transfer the induced AC current to the external circuit. DC Generator: Uses split rings (commutator) and brushes. The split rings reverse the connections e…
Name the three main types of power stations and their energy sources.
Answer
1. Thermal Power Station - Uses fuels like coal, CNG to generate steam (about 75% of India's electricity) 2. Nuclear Power Station - Uses nuclear energy to convert water into steam 3. Hydroelectric Po…
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Sources & Official References
- Kerala Board of Public Examinations — keralapareekshabhavan.in
- National Education Policy 2020 — education.gov.in
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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