Answer: λ2= 2.34 * 10^-6 C/m
Explanation: In order to calculate the value of the linear charge density of the insulating shell we have to multiply ρ* Volume of the hollow cylinder, so
Volume of cylinder:2*π*b*L *(b-a) where (b-a) is the thickness, then
λ2=Q/L = 634 *10^-6 C/m^3* 2*π*0.042 m*(0.042-0.26)== 2.34 μ C/m
Yes, that's correct. That's a big part of the reason why
the soap floats in water and the sponge sinks in it.
The electrical protective device is designed to detect a difference in
current between circuit wires and interrupt the circuit and stop the
flow of electricity is : A.GFCI
It stands for Grand Fault circuit
interruptor, this will open the circuit when a difference in current is
detected between the existing wires
