Sophomor Answer the following questions
1. Which physical quantity remains the same for all the resistors in series combination?
2. Which physical quantity remains the same for all the resistors in parallel combination?
3. Four resistors R1, R2, R3 and R4 are connected in series. Draw a circuit diagram and derive
an expression for the equivalent resistance of the combination.
4. Two resistances R1 and R2 are connected in parallel. Draw a circuit diagram and derive an
expression for the equivalent resistance of the combination.
A
5. The V-I graph for the parallel and series combination of three
resistors R1, R2 and R3 is shown in the figure. Which graph shows
the series combination? Explain the reason of your choice.
B
V
6. What are the advantages of parallel circuit in domestic wiring?
7. Why isn't a series arrangement not used for domestic wiring?
do

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