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Energy facts

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1)The word energy comes from the Greek word energeia.
2)Most types of energy are either a form of kinetic energy or potential energy.
3)Common examples include heat energy, elastic potential energy, chemical energy, sound energy, nuclear energy, geothermal energy , gravitational potential energy and electric Potential energy
4) Kinetic energy refers to the energy an object has because of its movement. A Truck in motion has kinetic energy, as does a basketball when you pass or shoot it.

10 Smart tips to study effectively

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1) Find a good study spot .A place with a lot of distractions makes for a poor study area.A quiet place with no distraction would be good study place.

2) Take good Notes. Read through your materials slowly and write down key points. Write down any questions you have about the materials that you can later discuss with your classmates or course instructor.Quiz yourself on the material you have just read. If you struggle with certain questions, make not of these areas for additional study.Summarize the Main Points .Once you have studied the material, see if you can answer these questions: Can you identify the main concepts covere

Kinematics Good conceptual problems

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Question: If you are riding on a train that speeds past other train moving in the same direction on adjacent train.It appears the other train is moving backward. Why?

Solution:
Your reference frame is that of the train you are riding. If you are traveling with a relatively constant velocity (not over

CBSE Call center

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CBSE has set up a dedicated Call Centre for handling routine enquiries and grievances pertaining to various activities and functions of the Board. Students presently studying in various CBSE affiliated schools, candidates appearing in private examination, pass out students of CBSE Board, parents, School management, new school seeking CBSE affiliation, awardees of CBSE scholarship schemes, aspirants and applicants for NEET, JEE, CTET, JNVST and general public can approach the CBSE Call Centre for obtaining information of the procedures/rules and regulations of various activities of the Board.

Use of concept of electric potential

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We already know about electric field and electric potential. We also know that electrostatic field is completely characterized by vector function E(r). The electric field depicts the force exerted on other electrically charged objects by the electrically charged particle the field is surrounding. Now a question arises why do we need introduction of electric potential when we already have electric field for the description of electric force between charges.

Screw Gauge physics experiment

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Introduction

A screw pitch gauge is a precision instrument. It is used for measuring diameter of circular objects mostly wires, with an accuracy of 0.001cm. It consists of a hollow cylinder mounted on a U frame. The hollow cylinder leads to a ratchet which is meant for fine adjustment. The U frame consists of a flat end known as stud and a screw on the other side. This screw can be moved inside the nut by fitted in the U frame by rotating the hollow cylinder called the thimble. This is called the main scale. The hollow cylinder or the thimble is graduated into 50 or 100 equal parts. This is called the circular scale.

What are light emitting diodes?

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A LED is a forward biased P-N junction diode which emits visible light when energized.

A light-emitting diode (LED) is a semiconductor light source. LEDs are used as indicator lamps in many devices and are increasingly used for other lighting. Introduced as a practical electronic component in 1962, early LEDs emitted low-intensity red light, but modern versions are available across the visible, ultraviolet, and infrared wavelengths, with very high brightness.