Question 1 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1c701f59b460d7261e671.PNG' />
Why won't the bulb glow in the circuit shown above?
Question 2 :
Fill in the blanks: In an electric circuit, the direction of current is taken to be from the ________ terminal to the ________ terminal of the electric cell.
Question 3 :
Fill in the blank: A device that is used to break an electric circuit is called _______________.
Question 4 :
Which of the following device is used to perform the activity to make toast ?
Question 5 :
Fill in the blank : An electric cell has _______ terminals.
Question 7 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1c666f59b460d7261e5ef.PNG' />
An electric bulb is connected to a cell through a switch as shown in the above figure. When the switch is brought in ‘ON’ position, the bulb does not glow. What could be the possible reason for it?
Question 8 :
When the switch is open there is an air gap between its terminals. State TRUE or FALSE?
Question 9 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61cc1a9978c526e972caefc8.PNG' />
Would the bulb glow in the circuit shown in figure?
Question 10 :
Paheli is running short of connecting wires. To complete an electric circuit, she may use a ____ .
Question 11 :
Fill in the blank: The thin wire that gives off light is called the _______ of the bulb.
Question 12 :
A switch helps to complete or break the circuit. State TRUE or FALSE?
Question 13 :
Fill in the blank: Electricity to the bulb in a torch is provided by the ________.
Question 14 :
A switch is the source of electric current in a circuit. State TRUE or FALSE?
Question 15 :
Fill in the blank: Switches, electrical plugs and sockets are made of _________.
Question 16 :
Which of the following device is used to perform the activity to heat water?
Question 17 :
What is a simple device that either breaks the circuit or completes it ?
Question 18 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1c65ef59b460d7261e5e6.PNG' />
The above figure shows a bulb connected to a cell in two different ways. What will be the direction of the current through the bulb in the case A ?
Question 19 :
Electric current can pass through a sheet of thermocol. Yes or No ?
Question 20 :
Fill in the blank: Materials which allow electric current to pass through them are called __________ of electricity.
Question 21 :
State whether True or False: The switches can not be used in lighting of electric bulbs and other devices in homes.
Question 22 :
State whether True or False: A fused bulb does not light up as no current passes through its filament.
Question 25 : <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 26 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1c661f59b460d7261e5e9.PNG' />
In the above figure, state whether the direction of current is correct or not.
Question 27 :
Both the electric cell and the bulb have two terminals each. Why do they have these two terminals?
Question 28 :
Fill in the blank: Metal disc is the ________ terminal of the electric cell.
Question 29 :
Which of the following electric device is used to perform the activity to get light?
Question 31 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1c661f59b460d7261e5ea.PNG' />
In the above figure, state whether the direction of current is correct or not.
Question 32 :
Fill in the blank: Materials which do not allow electric current to pass through them are called __________ of electricity.
Question 34 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1c66cf59b460d7261e5f5.PNG' />
In which of the following circuits A, B and C given in the above figure, the cell will be used up very rapidly?
Question 35 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1c662f59b460d7261e5eb.PNG' />
In the circuit shown above, when the switch is moved to ‘ON’ position _____ .
Question 36 :
Fill in the blank: Outer covering of electrical wires, plug tops, switches are made of ______.
Question 37 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1c665f59b460d7261e5ee.PNG' />
In the above figure, why will the bulb not glow in the circuit?
Question 39 :
Instead of metal wires, a jute string can be used to make a circuit. Yes or No ?
Question 40 :
State whether True or False: Human body is an insulator of electricity.
Question 43 :
Fill in the blank: _____ is the positive terminal of electric cell.
Question 44 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1c65cf59b460d7261e5e4.PNG' />
The above figure shows a bulb connected to a cell in two different ways. Will the bulb glow in both the cases?
Question 45 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1c66cf59b460d7261e5f4.PNG' />
The above figure shows a bulb with its different parts marked as 1, 2, 3, 4 and 5. Which of them label the terminals of the bulb?
Question 46 :
Which of the following device is used to perform the activity to cook food?
Question 47 :
Why should an electrician use rubber gloves while repairing an electric switch at your home?
Question 48 :
A torch is not functioning, though contact points in the torch are in working condition. What can be the possible reason for this?
Question 49 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1c65df59b460d7261e5e5.PNG' />
The above figure shows a bulb connected to a cell in two different ways. Does the brightness of the glowing bulb depend on the direction of current through it?
Question 50 :
State true or false : Electric current can flow through metals.
