A force of 25.0 N is applied to an object of mass 5.0 kg. The object covers a distance of 10.0 m. Calculate the work done when the direction of the applied force is same as the direction of motion. Calculate the amount of force required if the same amount of work is to be performed, when the force is applied at an angle of 30˚, 60˚, 75˚. Compare these values and comment on your observation.

the correct answer is b

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