Question Text
Question 1 :
Which of the following device is used to perform the activity to cook food?
Question 2 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61cc1a9978c526e972caefca.PNG' />
Explain why the bulb would not glow in the arrangement shown in figure.
Question 3 :
The handles of the tools like screwdrivers and pliers used by electricians for repair work usually have plastic or rubber covers on them. Can you explain why?
Question 4 :
Fill in the blank: _____ is the negative terminal of electric cell.
Question 5 :
Paheli wanted to glow a torch bulb using a cell. She could not get connecting wires, instead, she got two strips of aluminium foil. Will she succeed?
Question 7 :
Fill in the blank: The thin wire that gives off light is called the _______ of the bulb.
Question 8 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1c6fff59b460d7261e66f.PNG' />
Would the bulb glow in the circuit shown above, if instead of safety pin we use an eraser?
Question 9 :
Using the 'conduction tester' on an object it was found that the bulb begins to glow. Is the object a conductor or an insulator?
Question 10 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1c669f59b460d7261e5f2.PNG' />
Which of the above arrangement A, B, C and D should not be set up?