NEET 2022 | स्थिर वैद्युतिकी - L1 | Static electrics | Hindi Medium | Shubham Sir | 2 PM

An EM wave from air enters a medium .The electric fields are vecE _1 = vecE_(01 ) hat x cos [ 2 pi v ((z)/(c )-t)] in air and vecE_2 = E_(02) hat x cos [ k ( 2z-c t ) ] in medium , where the wave number k and frequency v refer to their values in air . the medium is non - magnetic . if epsi_(r_1) and epsi_(r_2) refer to relative permittivities of air and medium respectively , which of the following options is correct ?

S_(1) and S_(2) are two concentric spheres enclosing charges Q and 2Q respectively as shown in Fig. (i) What is the ratio of electric flux through S_(1) and S_(2) ? (ii) How will the electric flux through the sphere S_(1) charge, If a medium of dielectric constant K is introduced in the space inside S_(1) in place of air? (iii) How wil the electric flux through sphere S_(1) change, if a medium of dielectric constant K is introduced in the space Inside S_(2) in place of air?

STATEMENT-1 : Field lines are continuous in a medium. STATEMENT-2 : The path traced by a positive charge is a field line. STATEMENT-3 : The electric field line can intersect itself.

Electromanetic waves travel in a medium with a speed of 2 xx 10^(8) ms^(-1) . The relative magnetic permeability of the medium is 1. Find the relative electrical permittivity.

Statement-1 : Induced electric field can exist in conducting as well as non conducting medium. Statement-2 : Induced electric field depends only upon change in magnetic flux with time.

S_(1) and S_(2) are two bellow concentric spheres enclosing Q and 3Q respectively as shown in Figure. What is the ration of electric flux through S_(1) and S_(2) ? What would be electric flux through S_(1) ? If air inside S_(1) is replaced by a medium of dielectric constant 3 ?

In a multi-electron atom, which of the following orbitals described by the three quantum numbers will have the same energy in the absence of magnetic and electric field? 1) n=1, l=0, m=0 2) n=2, l=0, m=0 3) n=3, l=1, m=1 4) n=3, l=2, m=1 5) n=3, l=2, m=0

STATEMENT-1 : Velocity of light depends on electric and magnetic properties of medium, STATEMENT-2 : Electromagnetic wve does not need any material medium for its propagation.

A certain circuit consists of a DC source with emfan induction coil L1 , and a key K1 . No resistance is present in the circuit. Another coil, L2 , which is connected electrically to a resistor R through a key K2 , is fastened to L1 . At some moment in time key K1 is closed. After a certain tirne interval K2 is closed. flow do the current in the primary circuit (the one containing), the induction emf in the secondary circuit (the one with L2 and R ), and the current in the secondary circuit vary with time ?

The electric intensity due to a charged conducting cylinder of radius 0.1 m at a distance of 1 m from the axis of the cylinder of charge density 1.77muC//m in a dielectric medium of dielectric constant 2 is