Asolenoid 10.0 cm in diameter and 70.0 cm long is made from copper wire of diameter 0.100 cm, with very thin insulation. the wire is wound onto a cardboard tube in a single layer, with adjacent turns touching each other. to produce a field of 5.10 mt at the center of the solenoid, what power must be delivered to the solenoid?

The power must be delivered to the solenoid is 0.253 watt.

Explanation:

Given that,

Diameter = 10.0 cm

Length = 70 .0 cm

Diameter of copper wire = 0.100 cm

Magnetic field = 5.10 mT

We need to calculate the number of turns

Where, l = length

d = diameter of copper wire

Put the value into the formula

We need to calculate the current

Using formula of magnetic field

Where, B = magnetic field

n = number of turns

l = length

Put the value into the formula

We need to calculate the resistance

Using formula of resistance

We know ,

The resistivity of the copper wire

Put the value into the formula

We calculate the power

Using formula of power

Hence, The power must be delivered to the solenoid is 0.253 watt.

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