Tag: physics

Questions Related to physics

How many paint files can you open at a time?

digital painting tux paint physics

  1. $1$

  2. $2$

  3. $3$

  4. Many

Show answer
Correct Option: A
Explanation:

In MS Paint files can open at a time is 1. When we will try to open two files at a time it ask do save or not save or cancel.

How many sizes of the Erasers are available in paint tool box?

digital painting tux paint physics

  1. $1$

  2. $2$

  3. $4$

  4. $8$

Show answer
Correct Option: B
Explanation:

Sizes of the erasers are available in paint tool box are two.

1) Increase:- To increase the size of eraser.
2) Decrease:- To decrease the size of eraser.

When you increase the size of the drawing area what will the color of the increased area be?

digital painting tux paint physics

  1. The color of the existing drawing area

  2. White

  3. Black

  4. None of the above

Show answer
Correct Option: A
Explanation:

The colour of the increased area be the colour of the existing drawing area when you increase the size of the drawing area.

What is the maximum size to which you magnify the picture?

digital painting tux paint physics

  1. $2x$

  2. $4x$

  3. $6x$

  4. $8x$

Show answer
Correct Option: D
Explanation:

Maximum size to which you magnify the picture is 8x.

Minimum size to which you magnify the picture is 2x
Magnify the picture is the process of enlarging the apparent size like zoom in the picture.

How many times can you paste a picture you have copied in MS Paint?

digital painting tux paint physics

  1. $3$

  2. $2$

  3. Number of times

  4. None of the above

Show answer
Correct Option: A

What is the default extension of paint file?

digital painting tux paint physics

  1. .jpeg

  2. .gif

  3. .bmp

  4. Any of the above

Show answer
Correct Option: C
Explanation:

Default extension of paint file is .bmp.

.bmp full form bit map image file is a raster graphics image file format used to store bitmap digital images, independently of the display device.

Which tool and key combination should you use to draw the perfect straight line?

digital painting tux paint physics

  1. $Shift + Line\ tool$

  2. $Ctrl + line\ tool$

  3. $Alt + Line\ tool$

  4. None of the above

Show answer
Correct Option: A
Explanation:

The key combination should we use to draw the perfect straight line is shift + line tool. 

A thermos flask is designed to prevent the contents of the flask from losing heat. Which of the following statements concerning the design of thermos flasks is incorrect?

thermo flask thermos flask heat energy transfers transfer of heat physics

  1. The stopper helps reduce heat loss by convection

  2. The glass walls are silver coated to reduce emitted radiation

  3. The flask is designed to prevent heat loss by conduction, convection and radiation

  4. The vacuum between the glass walls prevents heat loss by preventing radiation

Show answer
Correct Option: D
Explanation:
Yes, thermoflask is designed to prevent  the contents of the flask from losing heat.
The stopper, i.e. vacuum between double walls of thermoflask prevents heat transfer through convection.
The glass walls are silver coated because it reduces emitted radiation when they are silver coated i.e. made shiny. And we know that shiny surfaces reflects all the heat so all the heat is being reflected inside the walls and heat remains unaffected. And the thinesss of glass walls will stop heat entering or leaving the flask by conduction.
So, the flask is designed to prevent heat loss by conduction, convection and radiation.

A                is a storage vessel that greatly lengthens the time over which its contents remain hotter or cooler than the flask's surroundings

thermo flask thermos flask heat energy transfers transfer of heat physics

  1. Closed flask

  2. Vacuum flask

  3. Conducting flask

  4. None of these

Show answer
Correct Option: B
Explanation:

A thermoflask is a storage vessel that greatly lengthens the time over which its contents remain hotter or cooler than the flask's surroundings. As thermoflask is designed to prevent heat loss by conduction, convection and radiation.

Vacuum in a vacuum flask prevents heat transfer through process of-

thermo flask thermos flask heat energy transfers transfer of heat physics

  1. Conduction only

  2. Conduction and Convection

  3. Convection only

  4. Radiation only

Show answer
Correct Option: B
Explanation:
Vacuum in a vacuum flask prevents heat transfer through process of conduction and convection.
It is so because, in conduction there needs a direct contact for transfer of heat and there is vaccum between two layers, so conduction can't  transfer heat in this case. And in convection, heat is transferred by molecular motion in fluid (liquid or gas). But due to vaccum's presence between two layers, molecular motion is not possible So convection is also impossible for this case.