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Science (Magnetism and electricity)

Author: salama eman
Description:
Keywords: , , , , , , online teaching

Content:
Quiz:

1. At home, small electromagnets are found in the electric mixer, television and electric bell.
A) TRUE
B) FALSE

2. The electromagnet consists of an iron bar, a coil and compass.
A) TRUE
B) FALSE

3. The dynamo are used in factories to move the heavy iron block.
A) TRUE
B) FALSE

4. The compass is used to detect the magnetic effect of an electric current passes in a wire.
A) TRUE
B) FALSE

5. ....................................................................................................................................................................................................................................................... Choose one or more than one correct answer :

6. The dynamo changes .......................
A) The electrical energy into mechanical energy
B) The mechanical energy into electical energy
C) The mechanical energy into thermal energy
D) The heat energy into mechanical energy

7. In the electric power generating plants, they use................... to generate large amount of electricity.
A) Huge electric generators.
B) small dynamo
C) Compass
D) Electromagnets

8. The magnetic force of the electromagnet can be increased by increasing the ...........................
A) Electric current intensity passing through the coil.
B) Magnet
C) Number of coil turns
D) Movement of the coil

9. An electric current can be generated by using .......................
A) A magnet
B) Electric mixer
C) A compass
D) An electromagnet

10. The dynamo consists of...................and .........................
A) U- Shaped magnet , coil
B) Electromagnet, wire
C) Small magnet, compass
D) Compass, wire

11. Write letter (E) under the machine that contains electromagnet and letter ( D) under the machine that contains dynamo:

12.
A) b.png

13. #
A) D,d

14.
A) ele.png

15. #
A) E,e

16.
A) te.png

17. #
A) E,e

18.
A) em.png

19. #
A) E,e
.