1. Electrical Energy Transmission to a Cabin
Created for CVCA Physics By
Dick Heckathorn
16 March 2K + 5

2. The Problem
Electricity energy is being transmitted on a wire of diameter 1.2 cm for a distance of 100 kilometers. It is being transmitted at the rate of 550 watts (Joules/sec). The wire has a total resistance of 16 ohms.

3. The Problem
a. Find first the current and, secondly, the power loss when the potential difference between the two ends of the wire is 110 volts. What percent was lost?

4. The Problem
b. Next, find the current and then the power loss when the potential difference between the two ends of the wire is 110,000 volts.

5. Current in Wires 110 Volts 110,000 Volts I = P/V
550 W / 100-V 550 W / 110,000-V
5 Amps Amps

6. Power Loss 110 Volts 110,000 Volts Ploss = I2 * R
(5-A)2 * 16-Ω (0.005-A)2 * 16-Ω
400 watts 4x10-4 watts

7. Percent Power Loss

8. power to be transmitted.
Power Equation 1
This power represents
power to be transmitted.

9. This power represents power loss
Power Equation 2
This power represents power loss

10. That’s All Folks