Question 1 : <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 2 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1c6fef59b460d7261e66e.PNG' />
Why won't the bulb glow in the circuit shown above, if instead of safety pin we use an eraser?
Question 3 :
Fill in the blank: A ________ has a bulb that lights up when it is switched on.
Question 5 :
Paheli is running short of connecting wires. To complete an electric circuit, she may use a ____ .
Question 6 :
A switch helps us to use electricity as per our requirement. State TRUE or FALSE?
Question 7 : <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 8 :
Electric current can pass through a sheet of thermocol. Yes or No ?
Question 9 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1c669f59b460d7261e5f1.PNG' />
Paheli connected two bulbs to a cell as shown in the above figure. She found that filament of bulb B is broken. Will the bulb A glow in this circuit?
Question 10 :
State true or false : Electric current can flow through metals.
Question 12 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1c674f59b460d7261e5ff.JPG ' />
The arrangement to store two magnets is shown by above figures (a), (b), (c) and (d) in Figure shown above. Which one of them is the correct arrangement?
Question 13 :
N - N shows positions in which one pole of a magnet is placed near that of the other. Which of the following action indicates this?
Question 14 :
What about opposite poles — do they attract or repel each other?
Question 15 :
Spread some iron filings on a sheet of paper. Now, place a bar magnet on this sheet. What do you observe?
Question 16 :
The materials which are attracted towards a magnet are called _______.
Question 17 :
It was observed that a pencil sharpener gets attracted by both the poles of a magnet although its body is made of plastic. Name a material that might have been used to make some part of it.
Question 18 :
State true or false:
Bar magnets always point towards North-South direction.
Question 19 :
A person rubs a magnet in the sand or soil and then pulls out the magnet. Now, he gently shakes the magnet to remove the particles of sand or soil. Are some particles still sticking to it?
Question 21 : <img src='61b1c6c1f59b460d7261e629' />
Look at the above figure. Will there be any difference in the shadow formed on the screen in A and B.
Question 22 :
Using a pinhole camera a student observes the image of two of his friends, standing in sunlight, wearing yellow and red shirt respectively. What will be the colours of the shirts in the image?
Question 23 : <img src='61b1c6a8f59b460d7261e626' />
You have 3 opaque strips with very small holes of different shapes as shown in the above figure. If you obtain an image of the sun on a wall through these holes, will the image formed by these holes be the same or different?
Question 24 :
State true or false : The colour of the shadow of an object depends on its colour of the object.
Question 25 : <img src='61b1c6b1f59b460d7261e627' />
Observe the above given figure. A sheet of some material is placed at position ‘P’, still the patch of light is obtained on the screen. What is the type of material of this sheet?
Question 26 :
Which of the following is/are not always necessary to observe a shadow?
Question 27 :
You are given a transparent glass sheet. Suggest any two ways to make it translucent without breaking it.
Question 28 :
Three identical towels of red, blue and green colour are hanging on a clothesline in the sun. What would be the colour of shadows of these towels?
Question 29 : <img src='61b1c6b9f59b460d7261e628' />
Three torches A, B and C shown in the above figure are switched on one by one. The light from which of the torches will not form a shadow of the ball on the screen?
Question 30 :
Two students while sitting across a table looked down on to its top surface. They noticed that they could see their own and each other’s image. The table top is likely to be made of:
