Displacement of does not arise due to motion of charge carries but it arises due to time variation of electric flux.

\(C=\frac { Q }{ V } =\frac { 1 }{ slope } \)
As slope of A is smaller capacitance of A is higher.

The material with high initial permeability, low retentivity, low coercivity and thin hysterisis loop with smaller area are preferred to make electromagnets.

(i) R is not affected by frequency so current does not change on an increasing frequency.
(ii) Inductive reactance X_L = 2π γL γ when frequency increases ~ increases and hence current in the circuit decreases.
(iii) Capacitive reactance X_c = \({ X }_{ c }=\frac { 1 }{ 2\pi \gamma c } \)
As the frequency ⋎ is increased, X_c decreases, and hence current increases.

The current in the series RLC circuit becomes maximum at resonance. Due to the increase in current, the voltage across L and C are also increased. This magnification of voltages at series resonance is termed as Q-factor. It gives a measure of sharpness of current peak in the resanance condition of LCT circuit

Resistivity = \(\cfrac { m }{ { ne }^{ 2 }\tau } =\rho \)
conductivity = \(\cfrac { { ne }^{ 2 }\tau }{ m } =\cfrac { I }{ \rho } \)
with increase in temperature r decreases. The conductivity decreases 

Electric iron, electric heater, electric toaster shown in are some of the home appliances that utilize the heating effect of current. In these appliances, the heating elements are made of nichrome, an alloy of nickel and chromium. Nichrome has a high specific resistance and can be heated to very high temperatures without oxidation. These are all working on joule's heating.

(i) Both forces obey inverse square law, F∝\(\frac{1}{r^2}\)
(ii) Both forces are proportional to product of masses or charges.
(iii) Both forces are conservative forces.
(iv) Both forces can operate in vacuum.

The average value of alternating current is defined as the average of all values of current over a positive half-cycle or negative half-cycle.

An electromagnetic waves are the waves that are radiated by an accelerated charge which propagates through space as coupled electric and magnetic fields, oscillating perpendicular to each other and to the direction of propagation of the wave.

i) The electric field is the negative gradient of the electric potential. \(E=\frac{-dV}{dx}\). 
ii) In vector form, \(\vec{E}=-\left[\frac{\partial V}{\partial x} \hat{i}+\frac{\partial V}{\partial y} \hat{j}+\frac{\partial V}{\partial z} \hat{k}\right]\)

The charge of an electron is the elementary charge in nature. Therefore, charge on any body is the integral multiple of an electron. The charge on any body can be expressed by the formula,
q = ne; where, n is the number of electrons, e is the charge on one electron.
n = 0, ±1, ±2, ±3, ±4, ...
This is called quantization of charge.

It states that the algebraic sum of the currents at any junction of a circuit is zero.

Microscopic form of ohm's law is 
\(\vec{J}=\sigma\vec {E}\) 
\(J=\frac{ne^2\tau}{m}\vec{E}\)
\(\frac{e \tau}{m} \rightarrow Drift \ velocity \ v_d\)
where \(\vec{J} \) - current density
\(\sigma \)  - conductivity
\(\vec{E} \) - Electric field