Question 1 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cbd6f59b460d7261ecb1.jpg' /> As shown in the above figure , Zubeda made an electric circuit using a cell holder, a switch and a bulb. When she put the switch in the ‘ON’ position, the bulb did not glow. Help Zubeda in identifying the possible defects in the circuit .

Question 2 :
Which of the following is the correct symbol of an electric bulb?

Question 3 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cbcaf59b460d7261eca0.jpg' /> <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61cc1abd78c526e972caf042.jpg' /> The image above shows two circuit diagrams. Are the images identical to each other ?

Question 4 :
A person takes an electric cell, a bulb, a switch and connecting wires. He makes an electric circuit. He keeps the switch in the ‘OFF’ position. Will the bulb glow?

Question 5 :
When current is switched ‘on’ in a room heater, it ___________.

Question 8 :
A combination of two or more cells is called a ________.

Question 9 :
Are the batteries used in tractors, trucks and inverters also made from cells?

Question 10 :
On what factors the amount of heat produced in a wire depends on?

Question 11 :
In automobiles, ________ mirror is used as a reflector in headlights of cars or scooters.

Question 12 :
The inner surface of a steel spoon acts as a ___ mirror.

Question 13 :
Image which cannot be obtained on a screen is __________ .

Question 14 :
Boojho thinks that objects are visible only when light reflected from them reaches our eyes. Is he correct?

Question 15 :
What type of mirror is used as a side mirror in a scooter?

Question 17 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cbdcf59b460d7261ecb8.jpg' /> A Person places a lighted candle in front of a plane mirror. He tries to see the flame of the candle in the mirror. It appears as if a similar candle is placed behind the mirror. The candle, which appears behind the mirror, is the image of the candle formed by the mirror as shown in the above figure. The candle itself is the object. Now, he moves the candle to different positions in front of the mirror. He observes the images in each case. Now, he places a vertical screen behind the mirror and tries to obtain the image of the candle on this screen. Can you get the image on the screen?

Question 18 :
An image that cannot be obtained on a screen is called ___.

Question 20 :
Image may be real, virtual and magnified or diminished in _______ mirror.

Question 21 :
If you are in a boat, is it easier to row if there is wind coming from behind you?

Question 22 :
What is the instrument used for measuring the speed of wind?

Question 25 :
You want to buy a house. Would you like to buy a house having windows but no ventilators.

Question 27 :
What planning is required in advance to deal with the situation created by a cyclone ?

Question 29 :
How does air move from one region to the other with respect to pressure ?

Question 32 :
A _____ shelter is a room situated deep inside or underground having no windows.

Question 33 :
A large cyclone is a violently rotating mass of air in the atmosphere of how much km high?

Question 36 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cc0ef59b460d7261ecfa.png' /> From the above circuit, what will be the order in which the bulbs A, B and C will glow when the switch is moved to the 'ON position?

Question 38 :
State True or False. To make a battery of two cells, the negative terminal of one cell is connected to the negative terminal of the other cell.

Question 39 :
State True or False. When current is switched 'on' in a room heater, it produces heat.

Question 40 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cc10f59b460d7261ecfc.png' /> From the above circuit, would any of the bulb glow when the switch is in the 'OFF' position?

Question 41 :
Fill in the blank: Winds are generated due to ___________ heating on the earth.

Question 42 :
Suggest method to find out wind direction at a given place.

Question 43 :
Fill in the blanks: Near the earth's surface ________ air rises up whereas ___________ air comes down.

Question 44 :
Fill in the blank: Air moves From a region of ____________ pressure to a region of ______________ pressure.