Storage Device

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                                                  Chapter 3            Lesson Overview Human beings store the information in their mind (memory of humans). Likewise, computer store information in its primary and secondary memory (memory of computer). They both can recognize it in the time of need. The physical parts of a computer that stores information and data either permanently or temporarily are called storage devices. They are classified as removable and non-removable storage devices. Computer memory is divided in to two parts. They are: 1.    Primary Memory 2.    Secondary Memory Primary Memory The memory that stores both processed and unprocessed data, program and instructions is known as primary memory. It is necessary for a computer to work. It is the main area where the data is stored. It operates at a very high speed. The stored data can
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Work, Energy and Power Mock test (online) questions.

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CHAPTER 4

 MOCK TEST OF WORK, ENERGY AND POWER







  Class 9. (Work, Energy and Power)
You must answer all the questions within 15 minutes.
Immersive Reader in Microsoft Forms allows you to hear the text of a form title and questions read out loud while following along. You can find the Immersive Reader button next to form title or questions after activating this control. You can also change the spacing of line and words to make them easier to read, highlight parts of speech and syllables, select single words or lines of words read aloud, and select language preferences.
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1.400 N force is applied on a box of mass 20 kg with an angle 60° with horizontal .
If the displacement is 50 m , how much is the work done ?
Single choice.
(2 Points)
2.Which of the following device convert sound to electrical energy?Single choice.
(1 Point)
3.Work done is ...... quantity.Single choice.
(1 Point)
4.4. A boy 25kg climbs up stairs , the stair case has 20 steps ,each steps is 20cm high.
If the boy takes 20 
seconds  . What is it's power?Single choice.
(2 Points)

5.How much is the potential energy of a body 100kg kept on the surface of the
earth. Single choice.
(1 Point)
6.How much KE increases  of the body If it's mass is doubled and velocity is 
doubled?Single choice.
(2 Points)
7.What is the relation between 1 erg and Joule ?Single choice.
(1 Point)
8.QuestionSingle choice.
(2 Points)
9.To he SI unit of work done is Single choice.
(1 Point)
10.Fossil fuel is ...... Energy .Single choice.
(1 Point)
11.Work done by a man of 60 kg sitting on the chair for  5 sec is . ....Single choice.
(1 Point)

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