Power Transmission To Dorm

A physics student has a single-occupancy dorm room. The student has a small refrigerator that runs with a current of \({{params.I_ref}}\textrm{ A}\) and a voltage of \({{params.V_ref}}\textrm{ V}\), a lamp that contains a \({{params.P_bulb}}\textrm{ W}\) bulb, an overhead light with a \({{params.P_light}}\textrm{ W}\) bulb, and various other small devices adding up to \({{params.P_other}}\textrm{ W}\).

Part 1

Assuming the power plant that supplies \({{params.V_pp}}\textrm{ V}\) of electricity to the dorm is \({{params.d_pp}}\textrm{ km}\) away and the two aluminum transmission cables have a diameter of \({{params.Al_d}}\textrm{ mm}\), estimate the percentage of the total power supplied by the power company that is lost in the transmission.

Answer Section

Please enter a numeric value.

Part 2

What would be the result if the power company delivered the electric power at \({{params.V_pp}}\textrm{ kV}\)?

Answer Section

Please enter a numeric value.

Attribution

Problem is from the OpenStax University Physics Volume 2 textbook, licensed under the CC-BY 4.0 license.