Question 1 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cb53f59b460d7261ec1b.PNG' /> Three bulbs A, B, C are connected in a circuit as shown in figure. When the switch is ‘ON’

Question 2 :
What is correct about a switch when it is in OFF position?

Question 4 :
Which of the following precautions need not to be taken while using electric gadgets/appliances/ circuit?

Question 5 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cbc8f59b460d7261ec9e.jpg' /> Would the bulb glow in the above electric circuit?

Question 6 :
Longer line in the symbol for a cell represents its ___________terminal.

Question 8 :
Which of the following is the correct symbol of a battery?

Question 10 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cbcef59b460d7261eca6.jpg' /> A person takes the cardboard tray from inside a discarded matchbox. He wraps an electric wire a few times around the cardboard tray. Then, he places a small compass needle inside it. Now, he connects the free ends of this wire to an electric cell through a switch as shown in above figure. He notes the direction in which the compass needle is pointing and brings a bar magnet near the compass needle. He moves the switch to the ‘ON’ position. Does the compass needle deflect?

Question 11 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cb50f59b460d7261ec1a.PNG' /> When an electric current flows through a wire AB as shown in the figure, the wire?

Question 13 :
Which of the following precautions need to be taken while using electric gadgets/appliances/ circuit?

Question 14 :
Which of the following is the correct symbol of an electric bulb?

Question 16 :
Choose the statement which is correct in the case of an electric fuse.

Question 17 :
Are the batteries used in tractors, trucks and inverters also made from cells?

Question 18 :
The coil behaves like a magnet when electric current flows through it. When the electric current is switched off, the coil generally loses its magnetism. Such coils are called?

Question 20 :
Which of the following is the correct symbol of a switch in OFF position?

Question 21 :
Which of the following precautions need to be taken while using electric gadgets/appliances/ circuit?

Question 23 :
Choose the statement which is correct in the case of an electric fuse.

Question 25 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cbd5f59b460d7261ecaf.jpg' /> In the circuit shown in the above figure, 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 26 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cbd4f59b460d7261ecae.jpg' /> In the circuit shown in the above figure, would any of the bulb glow when the switch is in the ‘OFF’ position?

Question 27 :
When an electric current flows through a wire , the wire gets _____ .

Question 28 :
Which of the following is the correct symbol of an electric bulb?

Question 29 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cbcdf59b460d7261eca4.jpg' /> A person takes the cardboard tray from inside a discarded matchbox. He wraps an electric wire a few times around the cardboard tray. Then, he places a small compass needle inside it. Now, he connects the free ends of this wire to an electric cell through a switch as shown in above figure. He notes the direction in which the compass needle is pointing and brings a bar magnet near the compass needle. He moves the switch to the ‘ON’ position. Move the switch back to the ‘OFF’ position. Does the compass needle come back to its initial position?

Question 30 :
Which of the following precautions need to be taken while using electric gadgets/appliances/ circuit?

Question 32 :
Choose the statement which is correct in the case of an electric fuse.

Question 35 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cbcbf59b460d7261eca2.jpg' /> A person makes the circuit as shown in the above figure. However, he replaces the cell with a battery of four cells. Also, in place of the nichrome wire, he ties a thin strand of steel wool. (The steel wool is commonly used for cleaning utensils and is available in grocery shops.) If there are any fans in the room, he switches them off. Now, he passes the current through the circuit for sometime. Does the strand of steel wool melt and break?

Question 38 :
Choose the statement which is correct in the case of an electric fuse.

Question 41 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cbc8f59b460d7261ec9e.jpg' /> Would the bulb glow in the above electric circuit?

Question 42 :
<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 43 :
Which of the following is the correct symbol of an electric cell?

Question 44 :
When an electric current flows through a wire, it behaves like a magnet. State true or false .

Question 45 :
When current is switched ‘on’ in a room heater, it ___________.

Question 46 :
When the current is switched on through a wire, a compass needle kept nearby gets deflected from its ______ position.

Question 47 :
True or False. If a large current passes through a wire, the wire may become so hot that it may even melt and break.

Question 48 :
On what factors the amount of heat produced in a wire depends on?

Question 49 :
A current carrying coil of an insulated wire wrapped around a piece of iron is called an electromagnet. State true or false .

Question 50 :
A combination of two or more cells is called a ________.