Home » Author Archives: admin (page 3)

Author Archives: admin

micrometer screw gauge measurement with least count formula

What is the micrometer screw gauge? It is an instrument used to measure diameter of thin wires, thickness of small sheets of glass,plastic etc. It can measure upto 1/10 of mr (or 0.01 mm= 0.001 cm) which is usually called the least count of screw gauge. Parts of micrometer screw gauge It consists of a U-shaped metal frame F with ...

Read More »

Vernier calliper measurement least count formula

What is the vernier calliper? It is an instrument used to measure the length,diameter,radius etc. It can measure up to 1/10 of mm (or 0.1 mm 0.01 cm) which is called least count of Vernier Callipers. Scales of vernier calliper Vernier scale Main scale Main scale is graduated is centimeter while Vernier scale slides along the main scale and is ...

Read More »

uses and function of stopwatch in physics laboratory

Stopwatch in physics definition A stopwatch is used to measure the time interval of an event. Types of stopwatch Digital stopwatch Mechanical stopwatch Digital stop watch It is commonly used in laboratories,it can measure a time interval up to 0.01 second.It starts to indicate the time lapsed as the start/stop button is pressed.As soon as start/stop button is pressed again,it ...

Read More »

Significant figures and scientific notation with Rules and examples

 Scientific notation definition In scientific notation a number is expressed as some power of ten multiplied by a number between 1 and 10. A simple and scientific method to write small or large numbers is to express them in some power of 10.The distance of moon from Earth is 384000000 meters.This is large number,it can also be expressed as 3.84×10 8 m.This ...

Read More »

Different branches of physics with definitions and topics

What is physics? The branch of science which deals with the interaction of matter and energy is called physics. The rapid progress in science during the recent years has become possible due to discoveries and inventions in the field of physics.The technologies of our modern society throughout the world are related to physics.For example a car is made on the ...

Read More »

Inductance of a toroid formula derivation and examples

What is toroid? The solenoid bent into circular shape is called toroid. Inductance of a toroid derivation Consider a toroid having rectangular cross sectional area.The inner radius of the toroid is ‘a’ while outer radius is b.The number of turns of toroid is N.Let i be the current flowing through each turn of toroid. The magnetic field lines inside the ...

Read More »

Newton’s first law of motion examples and law of inertia

Newton’s 1st law of motion definition Newton’s first law of motion states that ” A body continues its state of rest or of uniform motion in a straight line provided no net force acts on it.” According to newton’s first law of motion ,a body at rest remains at rest provided no net force acts on it.This part of law ...

Read More »

chemical effects of electric current

Chemical effects of current Voltmeter or coulomb meter: The vessel in which electrolytes is carried out.It is also called electrolytic cell. Electrolyte: An ionic compound in aquas solution or molten state is called an electrolyte. Electrolysis: On passing current through an electrolyte,chemical changes occur in electrolyte and substances are liberated at the electrodes.This process is called electrolysis. Faraday’s laws: First ...

Read More »

entropy in thermodynamics with examples and properties

What is entropy in thermodynamics? The concept of entropy was introduced into the study of thermodynamics by Rudolph Clausius in 1856 to give a quantitative basis for the second law. It provides another variable to describe the state of a system to go along with pressure, volume, temperature and internal energy. If a system undergoes a reversible process during which ...

Read More »

Newton’s laws of motion examples and applications in daily life

What are the three laws of motion? Newton’s first law of motion Newton’s second law of motion Newton’s third law of motion Different types of motion in physics with examples History For centuries the problem of motion and its causes was a central theme of natural philosophy,an early name for what we call physics.It was  not until the time of ...

Read More »