Magnetic Effects of Electric Current

Grade 10 Science — Magnetic Effects of Electric Current: 25 practice questions with instant scoring and explanations.

1. Magnetic field is produced by:
2. Magnetic field lines:
3. The right-hand rule states that if thumb points in direction of current, fingers curl in direction of:
4. A solenoid is:
5. An electromagnet's strength can be increased by:
6. The direction of force on a current-carrying conductor in magnetic field is given by:
7. Fleming's left-hand rule uses:
8. An electric motor converts:
9. An electric generator converts:
10. Electromagnetic induction is:
11. Faraday's law of electromagnetic induction states EMF is:
12. Lenz's law states that induced current direction is such that it:
13. In a DC motor, the split ring commutator's function is:
14. AC current changes direction:
15. DC current differs from AC in that:
16. Standard AC frequency in India is:
17. When a magnet is moved into a coil, induced EMF is maximum when:
18. A transformer is used to:
19. In a step-up transformer, the secondary coil has:
20. The magnetic field inside a solenoid is:
21. A loudspeaker works on principle of:
22. Magnetic force on a current-carrying conductor is zero when:
23. The strength of electromagnet depends on:
24. When magnetic flux through coil increases, induced current will:
25. AC voltage of 100V RMS is equivalent to DC voltage of: