Which gas law states that the pressure of a gas decreases when volume is increased and the temperature is unchanged?

a. charles' law
b. the general gas law
c. boyle's law
d. the law of cubic expansion

(C) Boyle's law

Explanation:

According to Boyle's law when we kept the temperature as constant and is we decrease the pressure of the gas then the volume of the gas is increases it means that at pressure and volume are inversely proportional to each other when we take temperature as constant.

So for the given statement Boyle's law will be correct option

So option (c) will be correct option  

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