IIT JEE : Electromagnetic Induction Electromagnetic Waves QUESTIONS AND ANSWERS :: part2 : 1 to 5
Following IIT JEE Entrance Multiple choice objective type questions and answers will help you in Maths, Physics and Chemistry 2024 examinations :
1.A motor |
| converts electrical energy into mechanical energy |
| converts mechanical energy into electrical energy |
| converts electrical energy into magnetic energy |
| produces mechanical energy |
2.Induction coil is based on the principle of |
| rheostate |
| self induction |
| mutual induction |
| induction |
3.The core of any transformer is laminated so as to: |
| reduce the energy loss due to eddy currents |
| make it light weight |
| make it robust and strong |
| increase the secondary voltage |
4.In an L-C-R circuit, capacitance is changed from C to 2C. For the resonant frequency to remain unchanged, the inductance should be changed from L to: |
| 4L |
| 2L |
| L/2 |
| L/4 |
5.A choke coil is preferred to a rheostat in AC circuit, then: |
| it consumes almost zero power |
| it increases current |
| it increases power |
| it increases voltage |
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