Name the following
An exmple where fprce acting on an object does not do any work.

The work done on an object does not depend on…..

A current that does not perform any work is

Choose the correct alternative and write it along with its allotted alphabet: The work done on an object does not depend on ……. A. displacement B. applied force C. initial velocity of the object D. the angle between force and displacement

Fill in the blanks with the appropriate term from the brackets : The capacity that an object has for doing work is called _____ .

Answer the following questions : Observe the diagrams and answer the questions. Write the names of any two instruments which work on the magnetic effect of electric current.

Observe the following diagram and write the answers of the following question Write the names of any two elements from the diagram which do not take part in chemical reaction.

Read the following paragraph and answer the following questions given below it : Construction of a compound microscope : (i) Acompound microscope consists of a metal tube fitted with two convex lenses at the two ends. These lenses are called the objective lens ( the lens directed towards the object ) and the eyepiece ( the lens directed towards the eye ). Both the lenses are small in size , but the cross section of the objective lens has a short focal length . the focal length of the eyepiece is more than that of the objective lens . (ii) The metal tube is mounted on a stand . thr principal axes of the objective lens and the eyepiece are along the same line . The distance between the object and objective lens can be changed with a screw . It is possible to change the distance between the objective lens and the eyepiece. Working : (i) The object to be observed is illuminated and placed in front of the objective lens. slightly beyond the focal length of the objective lens. it's real , inverted and enlarged image is formed by the objective lens on the other side. (ii) This intermediate image lies with in the focal length of the eyepiece. It serves as an object for the eyepiece. The eyepiece works as a simple microscope . the final image is virtual, highly enlarged and inverted with respect to the original object . It can be formed at the minimum distance of distinct vision from the eyepiece . The final image is observed by keeping the eye close to the eyepiece. Use: This microscope is used to observe blood cells , microorganisms , etc. Where do you place the object to be observed with a compound microscope ?

Answer the following questions: Observe the following diagram and write the answer the following questions: Write the names of any two elements from the diagram which do not take part in chemical reaction.

Read the following extract and answer the questions that follow: A liberal view behind the concept of organ and body donation is that after death our body should be useful to other needful persons so that their miserable life would become comfortable. Awareness about these concepts is increasing in our country and people are voluntarily donating their bodies. Life of many people can be saved by organ and body donation. Blinds can regain their vision. Life of many people can be rendered comfortable by donation of organs like liver, kidneys, heart valves, skin etc. Similarly, body can be made available for research in medical studies. Many government and social organization are working towards increasing the awareness about body donation. ii) Name any four organs that can be donated.