In my one of earlier articles on Newton’s law, I have discussed about the Newton’s second law. We all are also aware about the Newton’s first law which mainly states that if an object is at rest will remain at rest and if it is in uniform motion will remain in uniform motion until and unless some external force is applied on it. Continue reading
Do you want to be a scientist or an engineer? If you are opting for science stream and wondering what will you do after completing your plus two class. In India, most of the students of the non medical stream, after plus two pursue engineering because there is no shortage of engineering colleges in India or outside India. They may not get admission in the best or next best college but surely they will get admission in an engineering college. As we are discussing about science and engineering, let us first discuss the meaning of these two: Continue reading
Today we proudly announce the First WinnerScience Innovative Idea Contest- 2015 (WIIC-2015).
The objective of the WIIC is to encourage the students to solve the daily life problems with easy and innovative methods. The aim of the contest is to get the idea from your side, the idea may be in the idea form only or it may be in the practical form also. The proposal should focus on to solve the problems and it may be related to any field of science. Continue reading
For most of us, the assumption is that, the professional science degrees gain a lot of levee than pure science subjects. Pure streams are rarely a first choice. Students prefer engineering and medical than physics, chemistry, maths and biology. They assume that the pay and job security is much higher than studying a pure science course. But the truth is far from it. The fact that as a pure science student you get an opportunity to be a part of a bigger crowd – of educators, researchers, developers, innovators etc. These jobs is much more diverse, secure and rewarding than any other job. The best part is, that you can do all of this side by side, as professor you can be a researcher, a developer and many more. If you choose to be an educator, you get an opportunity to witness transition and evolution first hand. So if you are one of those who love the finer things of life, and would want a career as a future professor – Pure Sciences is definitely a way to go. Continue reading
We have already discussed the difference between distance and displacement. Let us today discuss the difference between displacement and angular displacement. We will also discuss the difference between velocity and angular velocity. Continue reading
Students often asked me what is the difference between force and torque? We might be aware about these terms that is force and torque. Let us understand the concept of force. Force according to a layman is an effort to change the state of a body from rest to motion or from motion to rest and it may also defined as an effort which tries to change the state but it may not change the state. For example, there may be heavy stone and we can try to change its state of rest but we may not be possible to do the same. Continue reading
We all are aware about the concept of force, if not then force may be defined as any push or pull that can change the state of rest of an object or can change the velocity of the moving object or can change the direction of the object. Forces can be classified into two types: conservative and non conservative forces. To understand the concept of these two, we also must be aware about the concept of work. The work is said to be done when a body actually moves a distance along the direction of the force. Now let us discuss the difference between the conservative and non conservative force: Continue reading
We all know that acceleration is rate of change of velocity. Thus according to this definition, if the velocity of the object is zero or constant, then its acceleration will be zero. But there are certain things in life where only definitions can not define another parameter but these parameters or things may be explained using certain logic. Continue reading
In the last article, we have discussed about the 8 advantages of alternating current over direct current. Today we will discuss the disadvantages or drawbacks of ac over dc. Let us discuss them one by one:
- First disadvantage is that the shock of the ac is attractive but the shock of dc is repulsive.
- At high voltages, it is more dangerous to work with ac than dc.
- In the processes like electrorefining, electroplating etc. , one can not use the ac. In these processes, only dc is used.
These are the 3 disadvantages of ac over dc. If you know more, please mention in the comment section.
We all are aware of the concept of ac and dc. There are certain differences between two and also there are advantages and disadvantages or drawbacks of ac over dc. I will discuss the advantages in this article and disadvantages in the next article. Let us discuss them one by one.
Advantages of ac over dc: Continue reading