# Question

A transformer is used by a European traveler while she is visiting the United States. She primarily uses it to run a 1200-watt hair dryer she brought with her. When the hair dryer is plugged in to her hotel room outlet in Los Angeles, she notices that it runs exactly as it does at home. The input voltage and current are 120 V and 11.0 A, respectively.

(a) Prove that this is not an ideal transformer.

(b) What is its efficiency?

(c) What is the rate at which heat is generated in the transformer itself?

(a) Prove that this is not an ideal transformer.

(b) What is its efficiency?

(c) What is the rate at which heat is generated in the transformer itself?

## Answer to relevant Questions

A solenoid of length 40.0 cm is made of 10,000 circular coils. It carries a steady current of 12.0 A. Near its center is placed a small, flat, circular metallic coil of 200 circular loops, each with a radius of 2.00 mm. This ...(a) In May 2008, the United States successfully landed a spacecraft named Phoenix near the northern polar regions of Mars. Immediately upon landing, the craft sent a message indicating that all had gone well. Using the ...An inductor is connected by itself to a 60-Hz ac voltage source. To ensure it has the same inductive reactance when it is connected to a 240-Hz source, would you decrease or increase its inductance value? By what factor ...If the current on a 10-μF capacitor is described by I = (120 A) sin (120πt + π/2), explain why the instantaneous voltage across it at t = 0 is zero whereas the cur-rent at that time is not. A single 2.0-μF capacitor is connected across the terminals of a 60-Hz voltage source, and a current of 2.0 mA is measured on an ac ammeter. What is the capacitive reactance of the capacitor?Post your question

0