Stuff

Question 1

Modulation Index in Communication System

Answer 1

modulation index = A(c)/A(m)
A(c) = Amplitude of carrier
A(m)= Amplitude of modulated
For avoiding distortion, M.I<=1

Question 2

Maximum Kinetic Energy of a photoeletron

Answer 2

KE=hc/λ - Φ;Φ= Work Function of metal

Question 3

What is threshold wavelength λ formula ?

Answer 3

λ =hc/Φ; Φ= Work Function of metal; The corresponding frequency is called Threshold frequency

Question 4

What is threshold frequency formula?

Answer 4

υ=c/λ=Φ/h is the threshold frequency formula

Question 5

What is the formulaic representation of Bragg’s Law?

Answer 5

2d sin x=nλ; n is an integer

Question 6

What is the formulaic representation of Bohr’s postulate of quantization of Angular Momentum?

Answer 6

mvr= nh/2π

Question 7

Which series comprises ultravoilet radiation? Which series comprises visible light ? Which series comprises infrared radtiation?

Answer 7

Lyman series comprises Ultravoilet radiation
Balmer series comprises Visible series
Everything else comprises Infrared Series

Question 8

What is the formula of Intensity of magnetization?

Answer 8

I= Magnetic Moment/Volume is the formula of intensity of magnetization

Question 9

What is the relation between intensity of magnetization and magnetic suspectibility in paramagnetic and diamagnetic material?

Answer 9

Intensity of magnetization I= Magnetic Susceptibility x * Magnetic Intensity H

Question 10

What is the formula of Magnetic Flux?

Answer 10

φ= BA cos ∅

Question 11

Torque acting on a loop in magnetic field

Answer 11

τ= NiAB sin ∅

Question 12

What is the formula of force experianced by a magnetic charge placed in a magnetic field B?

Answer 12

F=mB

Question 13

What is the formula of Torque on a bar magnet placed in a magnetic field?

Answer 13

τ= MxB=MB sin∅

Question 14

What is the formulaic representation of Biort Sarvt Law?

Answer 14

dB= μ°/4π x i dl sin ∅/r²

Question 15

What is the value of μ°/4π?

Answer 15

The value of μ°/4π= 4πx10^-7

Question 16

What is the formula of current density J?

Answer 16

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

Question 17

What remains constant in series and parallel configuration of electrical circuit?

Answer 17

In series configuration, Current Remains the same and in parallel configuration, Voltage remains the same

Question 18

What is the formula of capacitance C in terms of charge Q and voltage V?

Answer 18

Capactiance C= Q/V

Question 19

What is the formula of potential energy of a charged conductor?

Answer 19

U=1/2 qV=1/2 CV²= 1/2 q²/C J

Question 20

What is the formula of Energy density u in capacitors ?

Answer 20

Energy density in capacitors is given by u=1/2 ε° E²

Question 21

What is the formula of capacitance of a parallel plate capacitor?

Answer 21

C= kε°A/ D; k= medium between the plates

Question 22

What is the formula of capacitance of a parallel plate capacitor partially filled with dielectric ?

Answer 22

Write formula in copy

Question 23

What is the formula of capacitance of a parallel plate capacitor fully filled with dielectric ?

Answer 23

Write Formula in copy

Question 24

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?

Answer 24

Write formula in copy

Question 25

What is the magnitude of induced charge on dielectric?

Answer 25

q’=q(1-1/K)

Question 26

What is the formula of voltage of a capacitor amongst capacitors conected in series and in parallel?

Answer 26

V=q/C1 i