Match List I with List II:List I List II A AC generator i Presence of both L and C B Transformer ii Electromagnetic Induction C Resonance phenomenon to occur iii Quality factor D Sharpness of resonance iv Mutual Induction
Choose the correct answer from the options given below:
| List I | List II | ||
| A | AC generator | i | Presence of both L and C |
| B | Transformer | ii | Electromagnetic Induction |
| C | Resonance phenomenon to occur | iii | Quality factor |
| D | Sharpness of resonance | iv | Mutual Induction |
- A-IV, B-III, C-I, D-II
- A-II, B-IV, C-I, D-III
- A-II, B-I, C-III, D-IV
- A-IV, B-II, C-I, D-III
The Correct Option is B
Solution and Explanation
Based on fundamental electrical engineering concepts:
- An AC generator operates on Electromagnetic Induction (II).
- A Transformer operates based on Mutual Inductance (IV).
- Resonance phenomenon occurs due to Presence of both L and C (I).
- Sharpness of Resonance is linked to Quality Factor(III).
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Concepts Used:
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Magnets are used in many devices like electric bells, telephones, radio, loudspeakers, motors, fans, screwdrivers, lifting heavy iron loads, super-fast trains, especially in foreign countries, refrigerators, etc.
Magnetite is the world’s first magnet. This is also called a natural magnet. Though magnets occur naturally, we can also impart magnetic properties to a substance. It would be an artificial magnet in that case.
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Some of the properties of the magnetic field lines are:
- The lines and continuous and outside the magnet, the field lines originate from the North pole and terminate at the South pole
- They form closed loops traversing inside the magnet.
- But here the lines seem to originate from the South pole and terminate at the North pole to form closed loops.
- More number of close lines indicate a stronger magnetic field
- The lines do not intersect each other
- The tangent drawn at the field line gives the direction of the field at that point.