Electricity: Magnetic and Heating Effects Class 8 MCQ

class 8 science

General Instructions

  • Your test contains multiple-choice questions with only one answer-type question. There are a total of 10 questions
  • This is a 20 min test. Please make sure you complete it in the stipulated time
  • You can finish this test any time using the 'Submit' button.
1. The device which works on the principle of magnetic effects of electric current is
2. who discovered the magnetic effect of electric current?
3. The strenght of the electromagents increases
4. When the current is switched off in an electromagnet ?
5. When an electric current passes through a conductor, it gets heated. This phenomenon is called as
6. which of these metal pairs is not used in Voltaic cells
7. The polarity of the electromagnet depends on
8. Assertion (A): Electromagnets do not have poles like the North pole and South pole of a bar magnet.
Reason (R): When we interchange the terminals of the battery in a circuit, the poles of the electromagnet also change positions.
9. Carbon rod acts as ______ in dry cell
10. which electrode acts as postive terminal in Lemon cell?

 

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