The hair dryer with a power of 320 W is plugged into a 220V network. What is the current in the electric heater coil?
| February 8, 2021 | education
The hair dryer with a power of 320 W is plugged into a 220V network. What is the current in the electric heater coil? How much electrical energy is consumed in an electric heater for 1 hour?
Hair dryer power:
P = U * I, where P is the power of the hair dryer (P = 320 W), U is the mains voltage (U = 220 V), I is the current in the electric heater coil (A).
Let us express and calculate the value of the current in the electric heater coil:
I = P / U = 320/220 ≈ 1.45 A.
Electricity consumption of a hair dryer:
W = P * t, where t is the operating time of the apparatus (t = 1 h).
W = P * t = 320 * 1 = 320 W * h = 0.32 kW * h.
Answer: Electricity consumption is 0.32 kWh, current is 1.45 A.
One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.
