*Electron Volt is unite of electric energy.
*783Kev is the minimum electron energy in neutron beta decay.
*Proton and neutron are composed smaller particle called quark.
*Co_herent source of light means single wave length.
*Woolen cloths keep body warm bcz of bad conductivity.
*The open circuit test in a transformer is used to measure core loss.
*When bulb is turned on ohm's law is not applicable.
*If centripetal force is zero then centrifugal also zero.
*Negative of potential gradient is equal to electric intensity.
*if mass number increase density does not change.
*Acceleration in Simple pendulum is always negative to displacement.
*The Angular momentum of photon is zero.
*X_Rays used in crystallography to perform diffraction.
*Bone image is shown on X-rays photography bcz X-rays can be absorbed by bones.
*Mutual induction has a practical role in performance of transformer.
*When force is parallel to the direction of motion of the body,the work done is minimum.
*1st law of thermodynamics is special case of conservation of energy.
*In stationary wave the distance b/w adjacent node is equal to λ/2.
*An angular velocity of 60rpm is same as 2Ï€ rad/s.
*A star moving away from earth shows red shift.
*F=e(V×B)is valid for proton.
*photon cell is similar to photo electric effect.
*Alternating current generator use slip rings.
*The speed of sound in a metal is approximately 5000m/s.
*Platinum wire becomes yellow at 130 temperature.
*Plank's constant is analogous to angular momentum.
*A nucleus emits an alpha particle,followed by two beta particle the final nucleus will be an isotope of the original one.
*One redian means arc length of unit radius is unity.
*Red light photon has least momentum.
*For step down transformer Ns greater than Np.
*Basically potentiometer is a device for comparing two voltages.
*The existence of positron was discovered in cosmic radiation.
*Vs/A is unit of mutual inductance.
*B.dI=uI is expression of Ampere's law.
*IR radiation are used in green house effect.
*The role of Inductance is equal to inertia.
*volts/ampere =Ohm.
*For ideal step up transformer Ps=Pp.
*Fission and fusion both are example of renewable sources of energy.
*Perfect black body shows continuous spectrum.
*Half wave rectifier posses upper half cycle.
*the sum of absorption and transmission of light in a medium is equal to Incident light.
*Polarization explains that light is electric as well as magnetic in nature.
*Coulmb/volts=Farrad.
*The coupling co-efficient of perfectly coupled coil is one(1).
*Magnetic field density out side the solenoid is negligible.
*when object moving in a circle,the angle b/w linear velocity and position vector is 90°C.
*During Self Inductance number of turns varies as N^2.
*Energy of photon is directly proportional to frequency.
*Work done in a Isobaric process is given by Pdv.
*Angular velocity can not be infinite.
*Constant potential difference is required for establishing steady current.
*An arc of length equal to circumference of a circle subtends an angle of 2Ï€ radian.
*The angular displacement of an object after one complete revolution is "2Ï€" redian.
*Radiations are classified by its ionizing and non-ionizing nature.
*In full wave rectifier ripple factor is less.
*electric field lines due to a positive charge are radially away from the charge.
*Alpha rays used in smoke detectors.
*Wave nature of light is provided by polarization.
*Displacement of sun with respect to earth is "r".
*Instantaneous velocity is positive and negative.
*Work done by transition force in Simple pendulum is zero.
*Heavy metal used to detect radioactivity.
*Minimum energy required for pair production is 1.02Mev.
*Beats can be used to find frequency.
*The interference of green photon to red photon will cause no effect.
*Maximum power delivered by battery is Pmax=E^2/4r.
*Centrifuge is used to purify uranium.
*Momentum of photon is hf/c.
*Non-inverting amplifier circuits have very high input independence.
*Mass and energy are related to each other by Einstein law.
*The nuclear force is considered as strong force.
*Stationary Charge is not affected by magnetic field.
*Emf is equal to terminal potential difference when circuit is open.
*If we are standing in bus and driver applies a break then pseudo force pushes forward.
*According to Einstein mass energy are directly proportional.
*X-Rays is reverse process of photo electric effect.
*Momentum principle used in solar cells.
*Michelson measured the length of standard meter in terms of wave length of red candium light.
*Diode is non-ohmic resistor.
*Ripple factor of half wave rectifier is 1.21.
*Steady current does not change with time.
*Galvano meter is electro mechanical device.
*The principle behind the working of cathod rays osicilloscop is half wave rectifier.
*The value of angular momentum is maximum when angle is 90°.
*If pipe is closed at one end and open at other the closed end known as node.
*Work done on a ceiling fan by gravity is zero.
*The penetration power of x-rays depend upon frequency.
*The concept of work function was given by Einstein.
*Michelson determined velocity of light by using an octagonal rotating mirror.
*Centre tape rectifier circuit consist of 200%diode.
*Varticle velocity vs time graph for a projectile motion varies linearly.
*one of the major reasons for heat loss in transformer is Eddy current loss.
*Pseudo current may be defined as accelerating frame of reference.
*The Speed of photon in vacuum is smaller then in liquid water.
*The root mean square value of alternating current is equal to(1 under root 4)times of the peak value.
*Gamma rays can not be produce by electronic transition.
*Beta particle is actually a fast moving electron.
*if Alpha,Beta and Gamma rays carry same momentum all have same wave length.
*Wave transport energy without transporting mattet.
*The angle b/w radius vector and centripetal acceleration is "Ï€".
*There are zero quark in electron.
*if we make the magnetic field stronger the value of induce current is increase.
*Nuclear force is spin dependent but charge independent.
*The number of diode in bridge rectifier is four(4).
*For coil self_inductance is L and current is I then flux passing through it is LI.
*Charge and momentum both are conserved in pair production.
*Ripple factor is defined as Irms/Idc.
*power transformers have maximum efficiency at full load.
*Photon when scattered from mirror its momentum becomes double.
*R is the thermodynamic coordinate.
*Gamma rays shows comparable penetrating power to X-rays.
*Work done by friction can be positive or negative.
*Radiation exchange occurs in vacuum.
*An ideal reversible heat engine has highest efficiency.
*The voltage turns ratio in step_down transformer is 2:1.
*The insulation b/w sheets of transformer core is to get small Eddy current.
*Acceleration of earth around sun in its orbit is always tangential.
*Emf produced in generator is NwABcos(wt).
*If direction of field and area vector is opposite then field is negative.
*The value of Rydberg constant varies with atomic number as Z^2.
*Compton confirm existence of photon.
*Acceleration can be seen in rotating frame of reference.
*In Ultra violet region photon has highest energy.
*The resistance of super conductor is zero.
*Half-life is measured by Geiger Muller counter.
*Co_Herent sources are monochromatic sources which produce waves of constant phase difference.
*The fission reaction is slow reaction when neutrons slow down.
*According to wien's law temperature and wave length are inversely related.
*Value of current in short circuit is infinite.
*Spectral lines is like a finger print of absorbed or emission energy in a spectrum.
*In half wave rectification the diode conducts during positive half.
*The reverse process of pair production is known as annihilation of energy.
*Heavy water used to reduce the speed of fast moving neutron.
*The net force in an inertial frame is zero.
*The speed of sound in water is approximately 1500m/s.
*The resistance of human body is about 120k-ohm.
*Quarks are half spin particle.
*whene sound reflects back its known as echo sound.
*wave nature and particle nature of photon related to its momentum.
*In SONAR we use sound waves.
*Power remain unchanged in transformer.
*Projectile motion does not depend upon mass.
*The Alternating current can be converted into direct current by Rectification.
*Phosphorus-32 and strontium-90 used for skin cancer.
*Copper has low electrical resistivity.
*S.I unit of radioactivity is Becqueral.
*The speed of waves depend upon tension and mass per unit length of string.
*Very hot star emit blue colour.
*Projectile motion of object on earth always parabolic.
*Life time of an excited state is 10^-8s.
*1Rutherford is equal to 10^6becqueral.
*Atmosphere around the earth help by gravity.
*Momentum of white light is less than X-rays.
*Acceleration always positive for free falling body.
*H-atom can not produce Alpha rays.
*The black body which is close to perfect body is cavity radiator.
*S.I unit of Inductance is Henry.
*In stationary wave strain is maximum at node.
*Photocopier and ink-jet printer are applications of electrostatics.
*Temperature is defined by zeroth law of thermodynamics.
*The speed of sound in air is approximately 332m/s.
*Microscope uses shorter wavelength to reduce diffraction.
*The core of earth is hot due to frictional force.
*Centre tap rectifier circuit consist of 200%diode.
*Newtons 1st law falsified Aristotle theory.
*Angular frequency directly related to linear frequency.
*Breather is provided to transformer to absorb moisture of air during breathing.
*if number of loops increase than according to Faraday's law magnetic field,electric field and voltage also increase.
*The greek word"xeros and graphos means dry writing.
*Laser light is uni-directional.
*X-Rays were discovered in scattering experiment.
*Lenz law is in accordance with conservation of energy.
*Resistance of conductor depends upon length.
*A cycle tyres burst suddenly is an example of Adiabatic process.
*Molar mass of water is 0.108kg/mol.
*In A.C generator increase in number of turns in the coil increase emf.
*The electric potential at infinite distance zero.
*In fusion reaction of sun H isotopes are used.
*Alpha rays has highest charge.
*Young's double slit experiment support Huygen's wave theory.
*In Lorentz force magnetic force is deflecting force.
*The effect of nuclear bomb radiation lasts for more than 90years.
*In Compton scattering process wave length of scattered X-rays Increase.
*In stationary wave the distance between two consecutive crests is 1/2wavelength.
*In full wave rectifier with input frequency of 50Hz the ripple in output is mainly of the frequency of 100Hz.
*Pair production is possible in gamma rays photon.
*Electric field generate due to induction is conservative.
*S.I unit of equivalent dose is Sievert.
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