MCQ Science Curiosity Chapter 4 Class 8 CBSE Board

Advertisement

Electricity: Magnetic and Heating Effects

1. Why might the LED not glow in the lemon cell activity?

Question 1 of 20

2. What is the electrolyte in a dry cell?

Question 2 of 20

3. What is the negative terminal in a dry cell made of?

Question 3 of 20

4. What is the positive terminal in a dry cell?

Question 4 of 20

5. What is a key advantage of rechargeable batteries?

Question 5 of 20

6. What type of battery is commonly used in modern devices?

Question 6 of 20

7. What is a potential benefit of solid-state batteries?

Question 7 of 20

8. Why is nichrome wire commonly used in electrical heating devices?

Question 8 of 20

9. Why are electric heating devices considered more convenient than burning firewood?

Question 9 of 20

10. What happens to the compass needle if the battery terminals are reversed in Activity 4.4?

Question 10 of 20

11. Why might Sumana’s lifting electromagnet stop lifting paper clips after some time?

Question 11 of 20

12. In which case will the LED glow in Fig.4.11?

Question 12 of 20

13. Will the coil in Activity 4.4 still deflect the compass if the iron nail is removed?

Question 13 of 20

14. Which coil material will cause compass needle deflection when current flows?

Question 14 of 20

15. What is the effect of increasing the number of coil turns in Activity 4.3?

Question 15 of 20

16. Which nichrome wire heats up more in the activity with wires of different thicknesses?

Question 16 of 20

17. Which nichrome wire heats up more in the activity with wires of different lengths?

Question 17 of 20

18. What is a benefit of recycling batteries?

Question 18 of 20

19. What is the role of the electrolyte in a Voltaic cell?

Question 19 of 20

20. Why do migratory birds and animals use the Earth’s magnetic field?

Question 20 of 20


 

 

MCQ
Quiz

Leave a Reply

Your email address will not be published. Required fields are marked *

Advertisement

CBSE Board English Medium

ગુજરાત બોર્ડ

PSC Exam Preparation