PHYSICS

Electromagnetic field

Electromagnetic field questions and answers (physics)

1. What is electromagnetic field? Answer: Electromagnetic field is region where both electric force and magnetic force are felt by   charged particles. 2. What is the total force of electromagnetic field? Answer: the total force F of electromagnetic field is given by the vector sum of electric and magnetic forces. Fe and Fm respectively. That …

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Moment, equilibrium questions and answers

Moment, equilibrium questions and answers 1. When is object said to be in equilibrium? Answer: An object is said to be in equilibrium if is acted upon by two or more force and it does move or rotate. It shows that the resultant force acting on the system or the object is equal to zero. …

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Density

Density, Relative density, questions and answers

1. What is density? Answer:   It can be defined as mass per a unit volume.  The density is given as 2. If the unit of densities =kg/ m3 , convert the density of 0.4g/cm3 to SI units. Answer:  Note that; 3. How do you define the relative densities of a substances? Answer: Here water …

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Fundamental quantities

Fundamental, derived quantities and unit questions and answers

1. Name three important fundamental quantities Answer: The three important fundamental quantities are Mass, Length, and time 2. Why is Mass, length and Time most important fundamental quantities? Answer: They are most important fundamental quantities because, the units of these quantities form base unit upon which the units of other quantities depend on. 3. What …

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charge

Charge: Electric charges and atom questions and answers

Electric charges, atom questions and answers 1. What is static electricity? Answer:  Static electricity can be defined as a electric charge at rest. 2. What are the two types of static charges? Answer: They are Positive and negative charges 3. Electron and proton are negatively and positively charged respectively, so what charge is Neutron Answer: …

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Acceleration questions and answers in physics

1. What is acceleration? Answer: Acceleration is the rate of change of velocity or it can be simply defined as change in velocity per time. It is given mathematically as  Where a = acceleration, V=velocity and t= time taken 2. What is S.I unit of acceleration? Answer: It is m/s2 (that is meter per a …

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electric components

Electric components and symbols in physicss

Electric components and symbols What are the electric components? They are component needed in electric circuit for it to function and perform the purpose of designing the circuit. These components are , resistor, diode, Ic ( integrated circuit), transistor, capacitor, lED, LCD,  and many more. Electric components are of two types, active and passive components …

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Crystalline

crystalline, crystals definition, questions and answers

Crystalline and crystals 1. What is crystal? Answer:  A crystal is any solid substance that has definite melting point. 2. What is a crystalline compound? Answer:  A crystalline compound is a compound that has a definite shape peculiar to that compound 3. A substance of the same crystalline shape is referred to as what Answer: …

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Magnet and magnetism

magnet and magnetism questions and answers

Magnet and magnetism in physics 1. What is a magnetic material? Answer: A magnetic material is any material that can be attracted by magnet.? 2. What is a magnet? Answer: A magnet is any material that can attract magnetic materials. 3. What happen to a bar magnet suspended freely in the air? Answer:  When a …

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Physics practical on electricity, and precaution

Physics practical on electricity If you are a student preparing for exam, this is for you or maybe you are a teacher trying to refresh your brain before going to class, this is also very useful to you. This physics practical on electricity is going to teach you the relationship between resistance, current and potential …

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Electrolysis, examples and importance

Electric current can be conducted through a liquid or liquids by the process of electrolysis. What is electrolysis?  Electrolysis can be defined as decomposition of a certain liquid and solution into their component parts when electricity is passed through them.  Electrolysis cannot be discussed without talking about electrolyte, ions,   voltameter  and  electrodes. What is electrolyte?  It can be …

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electric circuit , resistors in parallel definition and diagram

Electric circuit, difference types What is electric circuit? It is part through which electric current flows. Electric circuit must consist of the cells or battery, load or resistor, and switch or key.  There are three types of electric circuits; Open, closed and short circuit.   Open circuit: A circuit is said to be open when …

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Transformers, Equation of transformer in physics

Definition of Transformers Transformers are devices use for changing the voltages or currents of an A.C supply. The transformers may be used to increase or decrease the A.C (alternating current) supply. The transformers make use of the properties of mutual inductance to change the voltage of the alternating current (A.C) supply. Transformer may be used …

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Circuit, Current electricity questions and answers

1. What is a circuit in electric current? Answer: A circuit is part through which electric currents flow. 2. List the type of circuit and explain them Answer: Open , closed and short circuits Open circuits: A circuit is said to be open when there is gap between the sources and loads, so that there …

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Eclipse: Lunar eclipse and solar eclipse 

What is eclipse?  It can be described as an astronomical event that occurs when an Celestial body become temporally  obscured , when it  pass into the shadow of another body or by having another body pass between it and the viewer .Eclipse is often used to explain either a solar eclipses or lunar eclipses (eclipses …

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Wave particle duality in micro maters physics

Wave particle duality What is Wave particle duality ? This is the concept of quantum mechanics, which states that every particle or quantum entity may be partly described in terms not only of particles but also of wave. The study of the behavior of light and other electromagnetic radiation, including the properties of wave like …

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Vectors and scalar quantities in physics

Vectors and scalar Representations of vectors Parallelogram law of vector Addition of two vectors (compounding two vectors) Resolution of vectors The resultant of more than two vectors Relative motion Vectors and scalar In physics physical quantities are divided into two; vectors and scalar quantities What is Vector quantity?  Vector quantities are physical quantities that have …

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wave equation, and general wave in physics

Table of Contents What are waves? Mechanical and Electromagnetic waves Waves motion Transverse and longitudinal waves Propagation of waves General representation of waves Terms use in describing waves and relationship between them Equations of traveling of waves Wavefronts Progressive and stationary waves Stroboscope Properties of waves Polarization  and  Polarization by reflection What is wave? A …

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Mirror formula

Mirror formula and the nature of the image formed by curved mirrors

Mirror formula and the nature of the image formed by curved mirrors What is a Mirror formula for concave mirror? A mirror formula is a relationship between the object distance or height (u), image distance or height (v) and focal length of the mirror Reflection of light by curved mirror A concave mirror has a …

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Refraction of light and Snell’s law in physic

Refraction of light CONTENTS Definition of refraction of wave Refraction of  through rectangular glass block Experimental determination of refractive index using real and apparent depth method Laws of Refraction  waves Refraction  through a triangular prism Total internal reflection and Critical angle Application of total internal reflection in nature Application of totally reflecting prisms Refraction  through …

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