Question 3 :
Fill in the blanks : Temperature of boiling water cannot be measured by a _______ thermometer.
Question 5 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cc12f59b460d7261ecff.jpeg' />
Look at figure given above. Mark where the heat is being transferred by conduction.
Question 11 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cb7af59b460d7261ec43.png' />
In the image above, at $B$ the heat is being transferred by:
Question 12 :
The materials which do not allow heat to pass through them easily are called :
Question 13 :
Choose the correct option for : Light coloured clothes are preferred during
Question 14 :
One litre of water at 30°C is mixed with one litre of water at 50°C. The temperature of the mixture will be :
Question 15 :
Which type of heat transfer is minimized when using a thermo flask?
Question 16 :
Clothes of ______________ colours absorb more heat better than clothes of light colours.
Question 17 :
An iron ball at $40^{\circ}C$ is dropped in a mug containing water at $40^{\circ}C$. The heat will-
Question 18 :
Fill in the blanks : Clothes of _______ colours absorb heat better than clothes of light colours.
Question 23 :
Choose the correct option for : Dark coloured clothes are preferred during
Question 25 :
Fill in the blanks : The hotness of an object is determined by its ______ .
Question 26 :
The materials which allow heat to easily pass through them are :
Question 27 :
A wooden spoon is dipped in a cup of ice cream, its other end:
Question 30 :
Can you then use laboratory thermometer to measure your body temprature?
Question 31 :
The materials which do not allow heat to pass through them easily are called :
Question 32 :
The materials which allow heat to pass through them easily are __________________ of heat.
Question 33 :
The process by which heat is transferred from the hotter end to the colder end of an object is known as __________.
Question 37 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cb76f59b460d7261ec3e.PNG' />
Observe the above figure : Water is being boiled in a pan of wide base. Which position $P$ or $T$ will feel warmer?
Question 38 :
A reliable measure of the hotness of an object is its _____________.
Question 39 :
Process of heat transfer which does not require any medium is:
Question 40 :
Which of these is a practical application of conductors of heat.
Question 42 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cb79f59b460d7261ec42.png' />
In the image above, at $A$ the heat is being transferred by:
Question 43 :
One litre of water at $30^{\circ}C$ is mixed with one litre of water at $50^{\circ}C$. The temperature of the mixture will be-
Question 44 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cb74f59b460d7261ec3c.PNG' />
In the arrangements (A) and (B) in the above figure, pins $P$ and $Q$ are fixed to a metal loop and an iron rod with the help of wax. In which case are both the pins likely to fall at different times ?
Question 45 :
To keep her soup warm Paheli wrapped the container in which it was kept with a woolen cloth. Why can she apply the same method to keep a glass of cold drink cool?
Question 46 :
One litre of water at 30°C is mixed with one litre of water at 50°C. The temperature of the mixture will be
Question 47 :
To keep her soup warm Paheli wrapped the container in which it was kept with a woolen cloth. Can she apply the same method to keep a glass of cold drink cool?
Question 48 :
The mode of heat transfer in which molecules of a fluid actually move after taking heat is called:
Question 49 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cb77f59b460d7261ec3f.PNG' />
Observe the above figure : Water is being boiled in a pan of wide base. Fill up the box $P$ to indicate the mode of flow of heat to the hand.
