An RCcircuit is connected across an ideal DC voltage source through an open switch. The switch isclosed at time t= 0 s. Which of the following statements regarding the circuit are correct? (Theremay be more than one correct choice.)A)The potential difference across the capacitor is always greater than the potential differenceacross the resistorB)The potential difference across the resistor is always greater than the potential differenceacross the capacitor. C)The capacitor charges to its maximum value in one time constant and the current is zero atthat time. D)The potential difference across the resistor and the potential difference across the capacitorare always equal. E)Once the capacitor is essentially fully charged, there is no appreciable current in the circuit.

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