Magnetism — Applications

Grade 10 Science — Magnetism — Applications: 25 practice questions with instant scoring and explanations.

1. Electromagnetic induction is the process of:
2. Faraday's law states: EMF induced ∝ rate of change of:
3. Lenz's law explains the direction of:
4. According to Lenz's law, induced current opposes:
5. A transformer converts:
6. In a transformer, the turns ratio Np/Ns =:
7. An AC generator works on the principle of:
8. In an AC generator, EMF induced is maximum when the coil is:
9. A DC motor uses:
10. The rotating coil in a DC motor experiences:
11. In household wiring, the neutral wire is connected to:
12. The earth pin in a three-pin plug is a safety feature that:
13. In a household circuit, devices are connected in:
14. An MCB (Miniature Circuit Breaker) trips when:
15. Mutual induction is the basis for:
16. Self-induction opposes change in:
17. The symbol used for AC in diagrams is:
18. A step-down transformer has:
19. RMS value of AC is related to peak value by:
20. In the equation ε = -dΦ/dt, the negative sign indicates:
21. Eddy currents are induced currents that:
22. A solenoid acts as an electromagnet when:
23. The frequency of household AC current in India is:
24. A fuse in a circuit acts as:
25. The back EMF in a DC motor: