Physics Practice: Electricity and Magnetism (Mock Test 5 - Ultimate Comprehensive)
1. The flow of electric charges through a conductor constitutes an ________.
2. Which of the following is the SI unit of resistance?
3. A device that breaks the circuit when it overheats due to high current is a ________.
4. Magnetic poles always exist in ________.
5. Like poles ________ each other and unlike poles ________ each other.
6. An electromagnet behaves as a magnet only when ________ flows through it.
7. The Earth acts as a giant magnet with its magnetic South Pole located near the ________.
8. In a domestic circuit, all appliances are connected in ________.
9. Which of the following is a magnetic material?
10. The heating effect of current is used in an ________.
11. A freely suspended magnet always rests in the ________ direction.
12. An electric cell converts ________ energy into electrical energy.
13. The space around a magnet where its force can be detected is the ________.
14. A fuse wire is made of an alloy that has a ________ melting point.
15. Which of these is a good insulator?
16. The magnetic lines of force start from the ________ pole and end at the ________ pole outside the magnet.
17. A compass is used to find ________.
18. If the number of turns in an electromagnet coil is increased, its strength ________.
19. Conventional current flows from ________ to ________.
20. The safety wire used in a 3-pin plug to prevent shocks is the ________ wire.