Ground conductor Insulators each provide 1.00 x 10° 2 Rosistance 240kV, 500A Transmission Line Figure 21.51 High-voltage (240-kV) transmission line carrying 5.00x 102 A is hung from a grounded metal transmission tower. The row of ceramic insulators provide 1.00x10° 2 of resistance each.

A coffee maker is rated at 1.20 kW, a toaster at 1.10 kW, and a waffle maker at 1.40 kW. The three appliances are connected in parallel to a common 120 V household circuit. (d) What total current is delivered to the appliances when all are operating simultaneously?

(a) What energy is dissipated by a lightning bolt having a 21,000 A current, a voltage of 121 MV, and a time duration of 1.00 ms? (b) What mass of tree sap could be raised from 18.0°C to its boiling point and then evaporated by this energy, assuming sap has the same thermal characteristics as water with a specific heat of 4184 J/(kg · °C) and a latent heat of vaporization of 2256 x 103 J/kg? kg

An electric heater is rated at 1.50 x 10³ W, a toaster at 500 W, and an electric grill at 1.25 x 10³ W. The three appliances are connected to a common 120-V household circuit. (a) How much current does each draw? heater A toaster A A grill (b) If the circuit is protected with a 28.0-A circuit breaker, will the circuit breaker be tripped in this situation? Yes Ο No Explain your answer.