O level Physics Energy Quizzes

  O level Physics Energy Quizzes
(The perfect guide to success in O level students studying Energy In Physics)

Welcome to gcequiz.com, an online revision platform that will ease your  revision by providing you with hundreds of quizzes to answer. Here in this quiz, we are going to be looking at ENERGY. We all do a lot of things during the day, and we all experience different forms of energy every now and done, we all are exposed to that. For Example, just you carrying water from a stream to your place on a sunny day itself has a lot to do with energy, as the Chemical energy in your system is converted to kinetic, and in doing so, your body is also converting heat energy from the sun to chemical, and so on. So we are going to see more about energy as we move ahead.

Energy 

Energy is and will always be defined as the ability or the capacity to do work . Its S.I unit is the Joule(J)
where 1J=1Nm . Energy is a scalar quantity.
Energy exist in many different forms, some of which are:
-Light energy which is energy visible to the naked eyes, an example is light from a lamp.
-Electrical energy which is the energy due to flow of charges, an example is a bolt of lightening
-Heat energy which is energy due to the temperature of a body, an example is the burning lamp, it produces heat energy in the process.
-Nuclear energy which is energy released during a nuclear reaction(radioactive reactions) , either fission or fusion. An example is energy between sub atomic particles
-Elastic potential energy also known as EPE is the energy stored in a material when work is done on it. A typical example is energy stored in an elastic rope, or elastic rubber band.
-Chemical Potential energy(GPE) which is energy stored in chemical bonds within atoms. An example is energy stored in food.
-Gravitational Potential energy is the energy a body possess due to its position in a gravitational field. Example, energy stored in a hydroelectric dam. And lastly,
-Kinetic Energy ;energy due to motion of an object, and example is energy in  a moving car.
Now lets look at how to calculate some of the energy forms:
-Kinetic energy(KE) is calculated as thus,
KE= 1/2mv2                    Where, KE= Kinetic energy
                                                           m=mass of the object
                                                           v=velocity of the moving object

-Gravitational Potential energy (GPE) is calculated as,

GPE=mgh                       Where  m=mass of the object
                                                        g=gravitational acceleration
                                                        h= height of object above the reference point of the Earth

Principle of Conservation of Energy
It is important to note that, energy can neither be created or destroyed, but can only be changed from one form to another. This is known as the law of conservation of energy. For example , a burning match, energy is converted from chemical to light and heat energy(Thermal energy).

Tis law says that in a closed or ideal system where no energy is lost due to friction and air resistance forces,

Total Initial Mechanical energy=Total final mechanical energy

Mathematically, 

(GPE+KE)i=(GPE+KE)f 

In cases where energy is lost or gained, Mechanical energy could be converted to other forms of energy in for of mainly heat and sound.

Therefore,  (GPE+KE)i=(GPE+KE)f +Energy converted to other forms

We'll end here for now but if you need to know about energy and other aspects in physics such as work, and power, click here , for you will find questions and answers(quizzes) under several topics in physics. To test your knowledge of the quiz, please take the quiz below and see how well you can do with what you have learnt so far. Go to gcequiz.com for our official website where you can also find a lot of exciting quizzes on subjects of science.

Enjoy!!!