Stuff Flashcards
Modulation Index in Communication System
modulation index = A(c)/A(m)
A(c) = Amplitude of carrier
A(m)= Amplitude of modulated
For avoiding distortion, M.I<=1
Maximum Kinetic Energy of a photoeletron
KE=hc/λ - Φ;Φ= Work Function of metal
What is threshold wavelength λ formula ?
λ =hc/Φ; Φ= Work Function of metal; The corresponding frequency is called Threshold frequency
What is threshold frequency formula?
υ=c/λ=Φ/h is the threshold frequency formula
What is the formulaic representation of Bragg’s Law?
2d sin x=nλ; n is an integer
What is the formulaic representation of Bohr’s postulate of quantization of Angular Momentum?
mvr= nh/2π
Which series comprises ultravoilet radiation? Which series comprises visible light ? Which series comprises infrared radtiation?
Lyman series comprises Ultravoilet radiation
Balmer series comprises Visible series
Everything else comprises Infrared Series
What is the formula of Intensity of magnetization?
I= Magnetic Moment/Volume is the formula of intensity of magnetization
What is the relation between intensity of magnetization and magnetic suspectibility in paramagnetic and diamagnetic material?
Intensity of magnetization I= Magnetic Susceptibility x * Magnetic Intensity H
What is the formula of Magnetic Flux?
φ= BA cos ∅
Torque acting on a loop in magnetic field
τ= NiAB sin ∅
What is the formula of force experianced by a magnetic charge placed in a magnetic field B?
F=mB
What is the formula of Torque on a bar magnet placed in a magnetic field?
τ= MxB=MB sin∅
What is the formulaic representation of Biort Sarvt Law?
dB= μ°/4π x i dl sin ∅/r²
What is the value of μ°/4π?
The value of μ°/4π= 4πx10^-7
What is the formula of current density J?
The formula of current density j= nqv; n= Number of Charge carrier, q= Charge, v= Voltage. Also, in terms of Ohm’s Law, J=σE
What remains constant in series and parallel configuration of electrical circuit?
In series configuration, Current Remains the same and in parallel configuration, Voltage remains the same
What is the formula of capacitance C in terms of charge Q and voltage V?
Capactiance C= Q/V
What is the formula of potential energy of a charged conductor?
U=1/2 qV=1/2 CV²= 1/2 q²/C J
What is the formula of Energy density u in capacitors ?
Energy density in capacitors is given by u=1/2 ε° E²
What is the formula of capacitance of a parallel plate capacitor?
C= kε°A/ D; k= medium between the plates
What is the formula of capacitance of a parallel plate capacitor partially filled with dielectric ?
Write formula in copy
What is the formula of capacitance of a parallel plate capacitor fully filled with dielectric ?
Write Formula in copy
What is the formula of capacitance of a parallel plate capacitor when a metal plate of thickness t is placed between the plates of a capacitor?
Write formula in copy
What is the magnitude of induced charge on dielectric?
q’=q(1-1/K)
What is the formula of voltage of a capacitor amongst capacitors conected in series and in parallel?
V=q/C1 i
