| 1 |
Electromagnets are used in |
- A. Elecric bell
- B. Speaker
- C. Dynamo
- D. All above
|
| 2 |
In which things of the followign electromagnet does nto pull toward itself. |
- A. Iron
- B. Nickle
- C. Wood
- D. Cobalt
|
| 3 |
Magnet is not used in |
- A. A dynamo
- B. An electric bell
- C. A speaker
- D. A heater
|
| 4 |
Whcih will not cause a magnet lose its magnetism. |
- A. Heating it
- B. Droppingit repeatedly
- C. Coating it with oil
- D. Hitting it
|
| 5 |
The space around a magenet where it can attract magnetic materials. |
- A. Electric field
- B. Magnetic field
- C. Magnetic pole
- D. Magnetic core
|
| 6 |
Glass is an example of |
- A. Non magnetic materials
- B. Magnetic materials
- C. Permanent magnet
- D. Temporary magent
|
| 7 |
The needlcompass is always there |
- A. To the North and south direction
- B. To the West and south direction
- C. To the North and East direction
- D. To the North and West direction
|
| 8 |
A freely suspended bar magenet always stays along. |
- A. East west direction
- B. North south direction
- C. Any direction
- D. Keeps oscillating
|
| 9 |
Which will not increase the strenght of an electromagnet. |
- A. Adding an iron core
- B. Adding a plastic core
- C. Coiling the wire
- D. Increasing the current
|
| 10 |
The direction of the Qibla is determined by |
- A. Emitter
- B. Armature
- C. Magnetic Compass
- D. Electromagnet
|
