Physics Formulas: Notes and Examples

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Jasmine Grover

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Physics Formulas, concepts, and problems help us in applying physics in our daily life to understand the working of the world around us. The advancement of physics concepts helps in the development of new technologies around us using basic physics formulas. For instance, development in the field of thermodynamics led to the advancement of industrialization.

These formulas of physics develop the basics for CBSE Class 10 and CBSE Class 12 Board Examinations. Physics Questions can be solved through the following approach:

  • Determining what is asked in the question
  • Using the correct physics formula
  • Fill in the required values and arrive at a proper result

In order to arrive at the solutions to these questions, one needs to understand the concepts, physics formulas as well as SI units that are used to measure various quantities. Students can refer to the following links to go through the various Physics formulas and solve examples of the same.

Physics Formulas

The various physics formulas used to solve the problems are given below. Students can read the concept, study the derivation of the formula, and look at some solved examples to enhance their understanding of the same:

List of all Physics Formula
Mirror Formula Potential Energy Formula Free fall formula
Heat Formula Terminal Velocity Formula Friction loss formula
Refractive Index Formula Gravitational Force Formula Froude number formula
Efficiency Formula Bulk Modulus Formula Heat flux formula
Angular Speed Formula Electrical Formula Heat of fusion formula
Binding Energy Formula Doppler Effect Formula Heat of reaction formula
Snells Law Formula Critical Angle Formula Heat of vaporization formula
Velocity Formula Projectile Motion Formula Heat rate formula
Archimedes Principle Formula Electrical Current Formula Horsepower formula
Angular Momentum Formula Frictional Force Formula Rotational inertia formula
Screw Gauge Formula Pulley Formula Relativity formula
Reynolds number Formula Longitudinal Waves Formula Maxwell boltzmann distribution formula
Drift Velocity Formula Electric Circuit Formula Thermal expansion formula
Magnetic Induction Formula Amplitude Formula Measurement formulas
Rest Mass of Electron Formula Bohr Radius Formula Moment formula
Voltage Divider Formula Force and Motion Formula Normal force formula
Drift Velocity Formula Coefficient of Static Friction Formula Poiseuilles law formula
Relative Speed Formula Luminance Formula Position formula
Radial Acceleration Formula Laplace Correction Formula Potential energy of a spring formula
Formula of Gas Constant Capacitors in Parallel Formula Pressure drop formula
Latent Heat Formula Heat Capacity Formula Wave energy formula
Friction Force Formula Tangential Acceleration Formula Energy consumption formula
Average Acceleration Formula Work Formula Distance traveled formula
Wavelength Formula Velocity Formula Gram formula mass
Torque Formula Tension Formula Resultant force formula
Surface Tension Formula Stress Formula Linear speed formula
Strain Formula Speed Distance Time Formula Signal to noise ratio formula
Resistivity Formula Resistance Formula Combustion formula
Pressure Formula Power Formula Temperature formula
Specific Gravity Formula Electric Power Formula Gravitational acceleration formula
Magnetic Flux Formula Inductance Formula Linear Momentum Formula
Impulse Formula Friction Formula Kinetic Energy Formula
Escape Velocity Formula EMF Formula Electric Field Formula
De Broglie Wavelength Formula Current Density Formula Displacement Formula
Average Velocity Formula Average Speed Formula Centripetal Force
Angular Velocity Formula Angular Acceleration Formula Capacitance Formula
Derivation of Prism Formula Intensity Formula Mean Free Path Formula
Wien’s Displacement Law Formula Fluid Pressure Formula Inelastic Collision Formula
Center of Mass Formula Radius of Gyration Formula Derivation Of Mirror Formula
Capacitive Reactance Formula Instantaneous Velocity Formula Orbital Velocity Formula
Mechanical Advantage Formula Strain Energy Formula Internal Resistance Formula
Transformer Formula Resultant Vector Formula Dynamic Viscosity Formula
Speed of Sound Formula Surface Charge Density Formula Newton's Second Law Formula
Magnetic Field in A Solenoid Formula Static Friction Formula Mass Flow Rate Formula
Instantaneous Speed Formula Radioactive Decay Formula Physics formulas for Class 9
Wavelength to frequency formula Fahrenheit to celsius formula Brewster’s Law Formula
Instantaneous rate of change formula Charge Density Formula Energy Density Formula
Energy Level Formula Sensible heat formula Time Constant Formula
Resonant frequency formula Magnetism formula Air resistance formula
Relativistic mass formula Semiconductor formula Wave speed formula
Heat load formula Centripetal force formula Water pressure formula
Time dilation formula Thermal energy formula Work done by gravity formula
Tangential velocity formula Banking of road formula Trajectory formula
Beam deflection formula Beat frequency formula Universal gravitation formula
Bernoullis equation formula Latent heat of fusion formula Calorimetry formula
Lattice energy formula Force of attraction formula Conservation of energy formula

Physics Formulas: List of some Basic Formulas

Some basic physics formulas are as discussed below – 

  1. Average Speed Formula

Average speed refers to the average of total speed of a moving body for the overall distance covered.

\(S = {d\over t}\)

where S refers to the average speed

d is the total distance traveled

and t is the total time taken.

  1. Acceleration Formula

Acceleration refers to the rate of change of velocity to the change in time. Acceleration can be denoted by the symbol ‘a’. The physics formula for acceleration is – 

\(a = {v-u \over t}\)

where a refers to the acceleration

v is the final velocity

u is the initial velocity

t refers to the time taken

  1. Density Formula

The physics formula of the density of a material refers to its denseness in a particular given area.

\(\rho = {m \over V}\)

where refers to the density

m is the mass of the body

V is the volume of the body.

  1. Newton’s Second Law

According to Newton's Second Law of Motion, the force can be expressed as the product of the mass and acceleration of the body.

F = m x a

where F refers to the force

m is the mass of the body

a is the acceleration in the available velocity

  1. Power Formula

Energy can be understood as the capacity to do work. Power can be understood as the amount of energy spent to do work in a unit of time. The physics formula for power can be denoted as – 

\(P = {W \over t}\)

where P is the power

W is the work done

t refers to the time taken

  1. Pressure Formula

Pressure can be understood as the amount of force applied per unit area of an object.

\(P = {F \over A}\)

where P is the pressure

F refers to the applied force

A is the total area of the object.

  1. Weight Formula

Weight refers to the force that an object experiences due to gravity. The physics formula for weight is – 

W = mg

where m is the weight of a body

m is the mass of the body

g refers to the acceleration due to gravity.

  1. Kinetic Energy formula

Kinetic Energy refers to the energy that is possessed by an object due to its state of motion.

\(E = {1 \over 2}mv^2\)

where E is the Kinetic Energy

m is the mass of the body

v refers to the velocity with which the object or body is traveling

  1. Frequency Formula

Frequency refers to the revolutions completed per second. Force physics formula is denoted as – 

f = \( {V \over \lambda}\)

where f is the frequency of the wave

V is the wave speed or the velocity

\(\lambda\) is the wavelength

  1. Ohms Law Formula

According to Ohms Law, the current running through a conductor material is directly proportional to the potential difference between the 2 endpoints of a conductor.

V = I x R

where V is the voltage, measured in Volts

I is the electric current that flows through the conductor, measured in Amperes

R is the resistance of the material, measured in Ohms.

These physics formulas can be used to understand the concepts and prepare well for the board exams.


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CBSE CLASS XII Related Questions

1.
A spherical conductor of radius 12 cm has a charge of 1.6 × 10–7C distributed uniformly on its surface. What is the electric field ?
  1. inside the sphere
  2. just outside the sphere
  3. at a point 18 cm from the centre of the sphere?

      2.
      (a) A circular coil of 30 turns and radius 8.0 cm carrying a current of 6.0 A is suspended vertically in a uniform horizontal magnetic field of magnitude 1.0 T. The field lines make an angle of 60° with the normal of the coil. Calculate the magnitude of the counter torque that must be applied to prevent the coil from turning. 
      (b) Would your answer change, if the circular coil in (a) were replaced by a planar coil of some irregular shape that encloses the same area? (All other particulars are also unaltered.)

          3.

          In a parallel plate capacitor with air between the plates, each plate has an area of 6 × 10–3 m2 and the distance between the plates is 3 mm. Calculate the capacitance of the capacitor. If this capacitor is connected to a 100 V supply, what is the charge on each plate of the capacitor?

              4.

              A tank is filled with water to a height of 12.5cm. The apparent depth of a needle lying at the bottom of the tank is measured by a microscope to be 9.4cm. What is the refractive index of water? If water is replaced by a liquid of refractive index 1.63 up to the same height, by what distance would the microscope have to be moved to focus on the needle again?

                  5.
                  A circular disc is rotating about its own axis at uniform angular velocity \(\omega.\) The disc is subjected to uniform angular retardation by which its angular velocity is decreased to \(\frac {\omega}{2}\) during 120 rotations. The number of rotations further made by it before coming to rest is

                    • 120
                    • 60
                    • 40
                    • 20

                    6.

                    A parallel plate capacitor made of circular plates each of radius R = 6.0 cm has a capacitance C = 100 pF. The capacitor is connected to a 230 V ac supply with a (angular) frequency of 300 rad s−1.

                    1. What is the rms value of the conduction current?
                    2. Is the conduction current equal to the displacement current?
                    3. Determine the amplitude of B at a point 3.0 cm from the axis between the plates.
                    A parallel plate capacitor made of circular plates

                        CBSE CLASS XII Previous Year Papers

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