WELCOME ALL

 This is special blog for prepare the all competitive exam and guide to the exam tips and exam notes and all guides with the special care to the career

Comments

Post a Comment

Popular posts from this blog

DC vs. AC

Image
In the Current Electricity section, you learned about electric charge, current, voltage and other related topics. But, just because you have a voltage does not mean electric current will flow. Electrons also need a complete loop of conductive material to flow, called a closed circuit . Let's look at a light switch. When you turn the switch "on", the switch creates a path that conducts electricity and electrons start to move—meaning electric current flows—and the light turns on. As soon as you turn the switch "off", the path is broken and electrons can no longer flow. The switch is like a drawbridge; switching it on is letting down the bridge so the electrons can cross (just like cars crossing a bridge) and provide energy to the light bulb. Illustration of how electric current can move through a closed loop of conductive material (left figure) but stops flowing whenever the loop is broken (right figure). This figure shows how a light bulb l...
Read more

Force, Motion, and Energy

Work: the force used to move something There are 2 basic types of energy:          A. Kinetic: the energy gotten from a moving object. A car going down a hill has kinetic energy.           B. Potential: energy waiting to be used (stored energy). A ball waiting to be dropped. The heavier an object is or the higher it is gives it more potential energy       Force: any push or pull that causes an object to move, stop, or change speed or direction Friction: a resistance to motion because objects are rubbing against each other.     Friction causes heat. Bike or car brakes use friction to slow them down. Inertia: when your body is riding in a car and the brakes are slammed on your body keeps moving forward that is inertia. Another example is when you are sitting on a sled and your dad jerks on the rope and you fall back (stay at rest) because of inertia. gravity: an unseen force that pulls two objects ...
Read more

ATOMIC AND NUCLEAR PHYSICS

A knowledge of atomic and nuclear physics is essential to nuclear engineers , who deal with nuclear reactors . It should be noted that atomic and nuclear physics is very extensive branch of science. Nuclear reactor physics belongs to an applied physics. Reactor physics, particle physics or other branches of modern physics have common fundamentals. Atomic and nuclear physics describes fundamental particles (i.e. electrons, protons, neutrons ), their structure, properties and behavior. Atomic and nuclear physics are not the same. The term atomic physics is often associated with nuclear power, due to the synonymous use of atomic and nuclear in standard English. However, physicists distinguish between atomic and nuclear physics. The atomic physics deals with the atom as a system consisting of a nucleus and electrons . The nuclear physics deals with the nucleus as a system consisting of a nucleons (protons and neutrons) . Main difference is in the scale . While the term atomi...
Read more