in a series LCR circuit to an ac source of variable frequency and voltage v= Vm sin ωt , draw a plot showing the variation of current (I) with angular frequency (ω) for two different values of resistance R1 and R2 (R1 >R2).write the condition under which the phenomenon of resonanceoccors. for which value of the resistance out of the two curves, a shaper resonance is produced ? define Q-factor of the circuit and give its significance

a and c

c is 100% but i am confused in a

a is the best answer your welcome

electromagnetic shielding is the practice of reducing the electromagnetic field in a space by blocking the field with barriers made of conductive or magnetic materials. shielding is typically applied to enclosures to isolate electrical devices from their surroundings, and to cables to isolate wires from the environment through which the cable runs. electromagnetic shielding that blocks radio frequency electromagnetic radiation is also known as rf shielding.

the shielding can reduce the coupling of radio waves, electromagnetic fields and electrostatic fields. a conductive enclosure used to block electrostatic fields is also known as a faraday cage. the amount of reduction depends very much upon the material used, its thickness, the size of the shielded volume and the frequency of the fields of interest and the size, shape and orientation of apertures in a shield to an incident electromagnetic

from wikipedia